Company lists · Data refreshed September 2026

Top 25 Marine conservation organizations based in the United States

Name: Marine conservation organizations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 313 companies tracked

RevenueBase identified 313 marine conservation organizations headquartered in the United States as of September 2026 and tracks 10,347 professional contacts across them, including 2,976 with verified work emails. Miami is the largest hub.

This list covers marine conservation organizations headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

313Companies

10,347Contacts tracked

2,976Verified emails

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The 25 largest marine conservation organizations based in the United States

Ranked by team size

Top 25 of 313 marine conservation organizations based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine conservation organizations: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Wildlife Conservation Society	Indirect evidence	Bronx, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,663 contacts →
	Indirect evidence “WCS stands for wildlife and wild places.” Source: RevenueBase Database · checked Sep 20, 2026
2	Monterey BAY Aquarium	Partial evidence	Monterey, CA, United StatesHQ checked Sep 20, 2026	501-1,000	738 contacts →
	Partial evidence “The mission of the nonprofit Monterey Bay Aquarium is to inspire conservation of the ocean.” Source: RevenueBase Database · checked Sep 20, 2026
3	Mote Marine Laboratory & Aquarium	Partial evidence	Sarasota, FL, United StatesHQ checked Sep 20, 2026	201-500	453 contacts →
	Partial evidence “Founded in 1955, Mote Marine Laboratory & Aquarium is an independent, nonprofit 501(c)3 research organization based in Sarasota, Fla, with additional field stations in eastern…” Source: RevenueBase Database · checked Sep 20, 2026
4	NEW England Aquarium	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	438 contacts →
	Strong evidence “The New England Aquarium is a catalyst for global change through public engagement, commitment to marine animal conservation, leadership in education, innovative scientific…” Source: RevenueBase Database · checked Sep 20, 2026
5	The Florida Aquarium	Partial evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	201-500	302 contacts →
	Partial evidence “The Florida Aquarium actively participates in and promotes stewardship of the natural environment as part of our mission of conservation.” Source: RevenueBase Database · checked Sep 20, 2026
6	Seattle Aquarium	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	51-200	272 contacts →
	Indirect evidence “The Seattle Aquarium is a nonprofit Aquarium committed to Earth’s one ocean.” Source: RevenueBase Database · checked Sep 20, 2026
7	Clearwater Marine Aquarium	Partial evidence	Clearwater, FL, United StatesHQ checked Sep 20, 2026	201-500	256 contacts →
	Partial evidence “OUR MISSION: We believe in preserving our environment while inspiring the human spirit through leadership in the rescue, rehabilitation, and release of marine life; environmental…” Source: RevenueBase Database · checked Sep 20, 2026
8	Seaside Sustainability	Partial evidence	Gloucester, MA, United StatesHQ checked Sep 20, 2026	51-200	240 contacts →
	Partial evidence “Seaside Sustainability is a nationally recognized, award-winning 501(c)3 charitable organization dedicated to community engagement, education and environmental conservation.” Source: RevenueBase Database · checked Sep 20, 2026
9	Ocean Conservancy	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	227 contacts →
	Indirect evidence “Our ocean is truly awesome-but it is not invincible.” Source: RevenueBase Database · checked Sep 20, 2026
10	Pacific Whale Foundation	Indirect evidence	Wailuku, HI, United StatesHQ checked Sep 20, 2026	51-200	191 contacts →
	Indirect evidence “Pacific Whale Foundation is a non-profit organization founded in 1980 to save whales from extinction.” Source: RevenueBase Database · checked Sep 20, 2026
11	SEA Shepherd Conservation Society	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 20, 2026	n/a	183 contacts →
	Strong evidence “Established in 1977, Sea Shepherd Conservation Society (SSCS) is an international non-profit, marine wildlife conservation organization.” Source: RevenueBase Database · checked Sep 20, 2026
12	Oceanx	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	11-50	135 contacts →
	Indirect evidence “OceanX is a mission to explore the unseen ocean, map uncharted areas of the world, observe rare deep-sea creatures, pursue scientific and medical breakthroughs, and then bring all…” Source: RevenueBase Database · checked Sep 20, 2026
13	Gulf Of Maine Research Institute	Indirect evidence	Portland, ME, United StatesHQ checked Sep 20, 2026	51-200	122 contacts →
	Indirect evidence “The Gulf of Maine Research Institute (GMRI) pioneers collaborative solutions to global ocean challenges.” Source: RevenueBase Database · checked Sep 20, 2026
14	Coral Restoration Foundation	Partial evidence	Key Largo, FL, United StatesHQ checked Sep 20, 2026	11-50	96 contacts →
	Partial evidence “Coral Restoration Foundation™ is a 501(c)(3) non-profit ocean conservation organization based in Key Largo, Florida.” Source: RevenueBase Database · checked Sep 20, 2026
15	National Marine Mammal Foundation	Partial evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	51-200	88 contacts →
	Partial evidence “The National Marine Mammal Foundation is a 501(c)3 nonprofit organization with a mission to improve and protect life for all marine mammals, humans, and our shared oceans by…” Source: RevenueBase Database · checked Sep 20, 2026
16	Marine Conservation Institute	Strong evidence	Glen Ellen, CA, United StatesHQ checked Sep 20, 2026	11-50	85 contacts →
	Strong evidence “Marine Conservation Institute is a team of highly-experienced marine scientists and environmental policy advocates dedicated to saving ocean life for us and future generations.” Source: RevenueBase Database · checked Sep 20, 2026
17	Hubbs-Seaworld Research Institute	Partial evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	51-200	53 contacts →
	Partial evidence “Hubbs-SeaWorld Research Institute (HSWRI) is a non-profit scientific research organization committed to conserving and renewing marine life to ensure a healthier planet.” Source: RevenueBase Database · checked Sep 20, 2026
18	Reef Check Foundation	Partial evidence	Marina Del Rey, CA, United StatesHQ checked Sep 20, 2026	11-50	50 contacts →
	Partial evidence “The Reef Check Foundation is an international non-profit organization dedicated to conservation of two ecosystems: tropical coral reefs and California rocky reefs.” Source: RevenueBase Database · checked Sep 20, 2026
19	The Ocean Foundation	Strong evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	46 contacts →
	Strong evidence “The Ocean Foundation is the gathering place for marine conservation donors and conservation entrepreneurs to advance global ocean solutions.” Source: RevenueBase Database · checked Sep 20, 2026
20	Seacoast Science Center	Partial evidence	Rye, NH, United StatesHQ checked Sep 20, 2026	11-50	46 contacts →
	Partial evidence “Seacoast Science Center is inspiring conservation of our Blue Planet.” Source: RevenueBase Database · checked Sep 20, 2026
21	Padi Aware Foundation	Partial evidence	Rancho Santa Margarita, CA, United StatesHQ checked Sep 20, 2026	11-50	38 contacts →
	Partial evidence “PADI AWARE Foundation™ is an accredited global charity with a mission to drive local action for global ocean conservation.” Source: RevenueBase Database · checked Sep 20, 2026
22	Greater Farallones Association	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	11-50	36 contacts →
	Partial evidence “Nonprofit partner to NOAA’s Greater Farallones and Cordell Bank National Marine Sanctuaries.” Source: RevenueBase Database · checked Sep 20, 2026
23	The Marine Mammal Care Center	Strong evidence	San Pedro, CA, United StatesHQ checked Sep 20, 2026	11-50	35 contacts →
	Strong evidence “The Marine Mammal Care Center inspires ocean conservation through marine animal rescue, rehabilitation, education, and research.” Source: RevenueBase Database · checked Sep 20, 2026
24	Mission Blue	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	11-50	32 contacts →
	Indirect evidence “Mission Blue inspires action to explore and protect the ocean.” Source: RevenueBase Database · checked Sep 20, 2026
25	Innoceana	Indirect evidence	CA, United StatesHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “Innoceana is an organisation that leads with innovation in the race to save our oceans.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: marine conservation organizations. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names marine conservation organizations.
Partial evidence: Its own public description names part of marine conservation organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine conservation organizations. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 313 marine conservation organizations based in the United States

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Marine conservation organizations based in the United States at a glance

As of Sep 20, 2026

28.8%Verified-email coverage

33.1Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · Miami

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

208

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 313 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among marine conservation organizations, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “marine conservation organizations”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names marine conservation organizations), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among marine conservation organizations, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,976 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names marine conservation organizations, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many marine conservation organizations are there based in the United States?

RevenueBase identified 313 marine conservation organizations headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Wildlife Conservation Society, headquartered in Bronx, tops this list with the largest team on record.

Which city has the most marine conservation organizations?

Miami leads with 14 headquartered companies, followed by Washington (9) and Los Angeles (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,976 verified decision-maker contacts tracked across these 313 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.