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Organization	Location	Revenue	Expenses	Assets	Program	Fundr. cost	Employees	Type
Ocean Habitat and Wildlife Rescue INC To educate and help in the eradication of non-native invasive species. To preserve and promote native species… 46-4120554 · FY2025	West Palm Bch, FL	$86.0M	$35.7M	$99.8M	70%	30%	—	501(c)(3)
Coastal Conservation Association Protection of the marine, animal and plant life and resources of the COASTAL areas of the united states, both… 74-1984482 · FY2024	Houston, TX	$27.7M	$23.1M	$46.8M	84%	0%	103	501(c)(3)
Sea Shepherd Conservation Society Marine wildlife CONSERVATION to end the destruction of habitat and slaughter of wildlife in the world's… 93-0792021 · FY2024	Alexandria, VA	$15.1M	$11.9M	$8.4M	86%	6%	10	501(c)(3)
Island Conservation Prevents extinctions by removing invasive species from islands. 91-1839907 · FY2024	Santa Cruz, CA	$13.4M	$12.2M	$13.2M	77%	8%	26	501(c)(3)
Save the Bay INC SAVE the BAY protects, restores, and improves the ecological health of the narragansett BAY region, including… 05-0343046 · FY2024	Providence, RI	$4.9M	$5.4M	$19.9M	82%	14%	43	501(c)(3)
Wildcoast The mission of WILDCOAST is to conserve coastal and marine ecosystems and address climate change through… 77-0536297 · FY2024	Del Mar, CA	$4.9M	$4.2M	$8.1M	82%	10%	14	501(c)(3)
Coastal Rivers Conservation Trust Caring for the lands, waters, and communities of the Damariscotta-Pemaquid Region. 23-7303162 · FY2023	Damariscotta, ME	$4.6M	$3.7M	$19.1M	80%	9%	39	501(c)(3)
Society for Conservation Biology To advance the science and practice of conserving earth's biological diversity. 33-0147824 · FY2024	Washington, DC	$3.8M	$3.6M	$4.1M	84%	0%	10	501(c)(3)
Seacology Seacology protects the threatened species and habitats of the worlds islands by working directly with local… 87-0495235 · FY2024	Berkeley, CA	$2.9M	$3.1M	$12.0M	77%	14%	9	501(c)(3)
Wildlife Guardians To help promote the survival and well-being of the african lion and other imperiled WILDLIFE species. 36-4712624 · FY2024	Washington, DC	$2.5M	$1.8M	$7.4M	92%	3%	2	501(c)(3)
Marin Audubon Society Incorporated The MARIN AUDUBON SOCIETY is dedicated to active participation in conservation, environmental education, and… 94-6076664 · FY2024	Mill Valley, CA	$2.2M	$691.0K	$9.5M	96%	1%	—	501(c)(3)
Foundation for Marine Ecology and Telemetry Research Support the conservation of marine species and populations by developing, improving and using technologies to… 81-1023070 · FY2024	Seabeck, WA	$1.9M	$1.9M	$1.2M	83%	0%	11	501(c)(3)
Wildlife Media Wildlife Media is committed to advancing conservation and achieving measurable impact on the worlds most… 20-8802794 · FY2024	Bellingham, WA	$1.0M	$463.5K	$1.2M	97%	0%	—	501(c)(3)
Environmental Protection in the Caribbean Incorporated Protecting the Caribbean environment through research and community-based actions. 65-1027393 · FY2024	Green Cove Springs, FL	$1.0M	$265.7K	$945.2K	61%	13%	1	501(c)(3)
Atlantic Marine Conservation Society Ltd Promote MARINE CONSERVATION through action 81-3706499 · FY2024	Hampton Bays, NY	$878.0K	$814.5K	$507.6K	86%	7%	11	501(c)(3)
Marine Megafauna Foundation Save threatened marine life using pioneering research, education, and sustainable conservation solutions 46-0645082 · FY2024	West Palm Bch, FL	$796.0K	$767.6K	$182.6K	93%	2%	—	501(c)(3)
Marin Conservation League The mission of MARIN CONSERVATION LEAGUE is to preserve, protect and enhance the natural assets of MARIN in a… 94-6089780 · FY2025	San Rafael, CA	$686.2K	$390.7K	$4.1M	75%	8%	3	501(c)(3)
Ocean Reef Conservation Association INC To protect and preserve the environment, fish, wildlife and marine related areas including water quality and… 26-4692639 · FY2024	Key Largo, FL	$680.3K	$715.6K	$1.6M	98%	0%	—	501(c)(3)
Refugia Marin Our mission is to create thriving habitat gardens for local pollinators and wildlife. We transform neglected… 92-0458533 · FY2025	Larkspur, CA	$657.7K	$499.5K	$306.1K	94%	3%	3	501(c)(3)
Buena Vista Audubon Society Conservation through education, advocacy and monitoring 23-7292749 · FY2024	Oceanside, CA	$483.0K	$963.7K	$7.9M	86%	4%	3	501(c)(3)
Global Exploration and Oceanographic Society Conserve atrisk species places in their natural environments by providing financial management infrastructure… 27-2241003 · FY2024	The Plains, VA	$426.9K	$181.1K	$449.5K	99%	0%	—	501(c)(3)
Marine Life Studies MARINE research, education and whale rescue 27-0318674 · FY2024	Moss Landing, CA	$349.9K	$333.2K	$563.7K	86%	3%	2	501(c)(3)
Bold Visions Conservation Wildlife and Land Protection 46-1905311 · FY2024	Albuquerque, NM	$302.7K	$296.1K	$45.7K	79%	13%	1	501(c)(3)
Action for Mantas ACTION for MANTAS aims to further the understanding and conservation of threatedned and endangered manta and… 81-1005011 · FY2024	Sacramento, CA	$259.6K	$222.8K	$165.2K	100%	0%	—	501(c)(3)
Amigos De Los Corales De Tela Conserve the ecosystem through research, education, and storytelling 93-2598811 · FY2025	Austin, TX	$258.6K	$118.4K	$177.1K	45%	51%	—	501(c)(3)
Wild Orca Translating science into action to save southern resident killer whales from extinction. 46-4936308 · FY2024	Friday Harbor, WA	$249.9K	$410.8K	$479.3K	90%	2%	2	501(c)(3)
Lowcountry Marine Mammal Network Protect local Marine mammals for future generations through quality science, public outreach ad conserving… 81-4887156 · FY2024	N Charleston, SC	$244.0K	$198.0K	$245.0K	0%	0%	4	501(c)(3)
Bay Access Foster conservation & use of oceans & bays 76-0637345 · FY2024	Seabrook, TX	$220.3K	$274.3K	$111.9K	93%	0%	—	501(c)(3)
Ocean Conservation Research 26-0719608 · FY2024	Lagunitas, CA	$190.0K	—	$67.4K	—	—	—	501(c)(3)
Marine Conservation Without Borders 81-3122642 · FY2023	Florence, SC	$186.0K	—	$0	—	—	—	501(c)(3)
Wildlife Impact Protect WILDLIFE in developing countries through evidence-based evaluation, capacity development and advocacy. 47-4310479 · FY2024	Portland, OR	$179.9K	—	$93.2K	—	—	2	501(c)(3)
Whales of Guerrero This corporations primary purpose shall be to advance marine conservation and science through collaborative… 83-1162579 · FY2024	Mendocino, CA	$175.6K	—	$128.6K	—	—	—	501(c)(3)
Thrive Conservation Nature conservation, including marine conservation and developing early career conservationists 85-1037276 · FY2024	Sacramento, CA	$114.4K	$100.7K	$175.3K	69%	0%	—	501(c)(3)
Conservation Action Project 31-1544350 · FY2025	Bowling Green, OH	$102.6K	—	$145.9K	—	—	—	501(c)(3)
Conservation Research and Education Opportunities 20-3574087 · FY2025	Seattle, WA	$100.0K	—	$145.5K	—	—	—	501(c)(3)
Cape Coral Friends of Wildlife INC Preserve and enhance the habitats of protected and threatened WILDLIFE species and educate the community… 06-1694487 · FY2024	Cape Coral, FL	$95.5K	$100.2K	$89.6K	95%	2%	—	501(c)(3)
Conservation Agency Ecological and systematic investigations in biological diversity for wildlife and ecosystem conservation. 05-0392995 · FY2024	Jamestown, RI	$78.1K	$22.0K	$287.1K	90%	0%	—	501(c)(3)
Mission Wildlife Supporting species conservation through fundraising, awareness and education. 85-0982932 · FY2024	Poway, CA	$77.9K	—	$44.5K	—	—	—	501(c)(3)
Marine Order for Research & Action Through Environmental Stewardship 84-2898638 · FY2025	Miami, FL	$76.0K	—	$50.4K	—	—	—	501(c)(3)

2,046,138

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Public data from IRS Form 990 e-file & Business Master File. A 990 shows reported financial activity, not measured program outcomes. Assets are from the IRS BMF and may lag the latest filing; fundraising cost is fundraising expenses as a share of total expenses. · philanthropy.org