There are no under development actions associated with this management plan.
Clams, Mussels, Oysters Results
Giant Clam (Hippopus spp.)
Giant Clam (Hippopus spp.)
Hippopus spp.
Also Known As
Horse's hoof clam, Bear paw clam
Protection Status
ESA Candidate
Throughout Its Range
CITES Appendix II
Throughout Its Range
Quick Facts
Weight
Up to 500 pounds
Length
Up to 4.5 feet
Lifespan
100 years
Threats
Climate change,
Disease,
Habitat degradation,
Illegal trade and poaching,
Overfishing,
Sedimentation and pollution
Region
Pacific Islands
Giant clams. © Doug Helton, WOD submission
Giant clams. © Doug Helton, WOD submission
About the Species
Giant clams are the largest living marine bivalves and typically inhabit tropical coral reefs in coastal regions throughout the Indo-Pacific Ocean. Giant clams are members of the Subfamily Tridacninae, which consists of two genera: Hippopus and Tridacna.
Currently, seven giant clam species are candidate species for listing under the Endangered Species Act. This includes two species in the genus Hippopus (H. hippopus and H. porcellanus) and five species in the genus Tridacna (T. derasa, T. gigas, T. mbalavuana (tevoroa), T. squamosa, and T. squamosina (costata).
Scientific Classification
| Kingdom | Animalia | Phylum | Mollusca | Class | Bivalvia | Order | Cardiida | Family | Cardiidae | Genus | Hippopus | Species |
|---|
Featured News
A grant project in Guam is setting up giant clam aquaculture in two southern villages, Inalåhan and Malesso. Giant clams are a culturally important species in Guam, where they’re also regulated due to overharvesting. Credit: David Burdick
Fifteen of the 83 species included in the Pacific Islands vulnerability assessment. From left to right: Acanthurus achilles, Caranx melampygus, Tripneustes gratilla, Acanthurus triostegus, Scarus rubroviolaceus, Cephalopholis argus, Octopus cyanea, Lutjanus kasmira, Panulirus penicillatus, Triaenodon obesus, Selar crumenophthalmus, Ctenochaetus strigosus, Naso unicornis, Zebrasoma flavescens, Tridacna maxima. Photo credit: Bruce Mundy.
Related Species
Giant Clam (Tridacna spp.)
Giant Clam (Tridacna spp.)
Tridacna spp.
Protection Status
ESA Candidate
Throughout Its Range
CITES Appendix II
Throughout Its Range
Quick Facts
Weight
Up to 500 pounds
Length
Up to 4.5 feet
Lifespan
100 years
Threats
Climate change,
Disease,
Habitat degradation,
Illegal trade and poaching,
Overfishing,
Sedimentation and pollution
Region
Pacific Islands
Giant clams. © Doug Helton, WOD submission
Giant clams. © Doug Helton, WOD submission
About the Species
Giant clams are the largest living marine bivalves and typically inhabit tropical coral reefs in coastal regions throughout the Indo-Pacific Ocean. Giant clams are members of the Subfamily Tridacninae, which consists of two genera: Hippopus and Tridacna.
Currently, seven giant clam species are candidate species for listing under the Endangered Species Act. This includes two species in the genus Hippopus (H. hippopus and H. porcellanus) and five species in the genus Tridacna (T. derasa, T. gigas, T. mbalavuana (tevoroa), T. squamosa, and T. squamosina (costata).
Scientific Classification
| Kingdom | Animalia | Phylum | Mollusca | Class | Bivalvia | Order | Cardiida | Family | Cardiidae | Genus | Tridacna | Species |
|---|
Featured News
A grant project in Guam is setting up giant clam aquaculture in two southern villages, Inalåhan and Malesso. Giant clams are a culturally important species in Guam, where they’re also regulated due to overharvesting. Credit: David Burdick
Fifteen of the 83 species included in the Pacific Islands vulnerability assessment. From left to right: Acanthurus achilles, Caranx melampygus, Tripneustes gratilla, Acanthurus triostegus, Scarus rubroviolaceus, Cephalopholis argus, Octopus cyanea, Lutjanus kasmira, Panulirus penicillatus, Triaenodon obesus, Selar crumenophthalmus, Ctenochaetus strigosus, Naso unicornis, Zebrasoma flavescens, Tridacna maxima. Photo credit: Bruce Mundy.
Related Species
Atlantic Surfclam and Ocean Quahog Management Plan
About
The surfclam and ocean quahog fishery is managed under a fishery management plan (FMP) developed by the Mid-Atlantic Fishery Management Council. With the exception of the Maine mahogany quahog fishery, the fishery has operated under an individual transferable quota (ITQ) management system since 1990.
The principal gear used in the fishery is the hydraulic clam dredge, which uses jets of water to dislodge ocean quahogs and surfclams from sediments.
A smaller "dry" dredge (without hydraulic jets) is used in Maine waters to harvest Maine mahogany quahogs.
The mahogany quahog fishery off Maine is managed under a relatively small quota that is separate from the quota used to manage the ITQ fishery. Ocean quahogs off Maine are managed separately because of differences in biological, fishery, and market characteristics.
Implementing regulations are found at 50 CFR part 648 subpart E. Find out more about Managing Sustainable Fisheries in the Greater Atlantic Region.
Species Managed
More Information
Actions
Final Rule for 2024 Surfclam and Ocean Quahog Specifications and Minimum Size Suspension for Surfclams
2024 Surfclam and Ocean Quahog specifications and minimum size
Effective
01/01/2024
Improvement and Modernization of Atlantic Surfclam and Ocean Quahog Vessel Reporting Regulations
Improvement and Modernization of Atlantic Surfclam and Ocean Quahog Vessel Reporting Regulations
Effective
09/27/2023
Final Rule for 2023 Atlantic Surfclam and Ocean Quahog Specifications
2023 surfclam and ocean quahog specifications and minimum size suspension
Effective
01/01/2023
Final Rule for the Atlantic Surfclam and Ocean Quahog Excessive Shares Amendment
surfclam and ocean quahog excessive shares amendment
Effective
12/23/2022
Final Rule for 2022 Surfclam and Ocean Quahog Specifications and Minimum Size Suspension for Surfclams
surfclam and ocean quahog quotas 2022, minimum size suspension 2022
Effective
01/01/2022
Final 2021 and Projected 2022-2026 Specifications for the Atlantic Surfclam and Ocean Quahog Fisheries
2021 surfclam and ocean quahog specifications
Effective
06/14/2021
Habitat Clam Dredge Exemption Framework
NOAA Fisheries is implementing the New England Fishery Management Council's; Habitat Clam Dredge Exemption Framework Adjustment to its Fishery Management Plans.
The action will establish areas within the Great South Channel Habitat Management Area
Effective
06/18/2020
Final 2020 Atlantic Surfclam and Ocean Quahog Commercial Fishery Specifications and Minimum Size Suspension for Atlantic Surfclams
Atlantic surfclam and ocean quahog 2020 specifications
Effective
01/01/2020
Atlantic Surfclam and Ocean Quahog Fisheries: 2019 Fishing Quotas and Suspension of Minimum Atlantic Surfclam Size Limit
NOAA Fisheries suspends the minimum size limit for Atlantic surfclams for the 2019 fishing year. NOAA Fisheries also announces that the quotas for the Atlantic surfclam and ocean quahog fisheries for 2019 will remain status quo. Regulations governing thes
Effective
01/01/2019
Final Action to Close Nantucket Lightship and Closed Area I Closure Areas to Gillnet Gear
NOAA Fisheries closes Nantucket Lightship and Closed Area I Closure Areas to gillnet gear.
Effective
12/17/2018
Omnibus Essential Fish Habitat Amendment 2
This action implements approved regulations for the New England Fishery Management Council's Omnibus Essential Fish Habitat Amendment 2. This rule revises essential fish habitat and habitat area of particular concern designations, revises or creates habit
Effective
04/09/2018
Fisheries of the Northeastern United States; Atlantic Surfclam and Ocean Quahog Fishery; 2018-2020 Fishing Quotas
This final rule implements status quo commercial quotas for the Atlantic surfclam and ocean quahog fisheries for 2018 and projected status quo quotas for 2019 and 2020. This action is necessary to establish allowable harvest levels of Atlantic surfclams a
Published
02/06/2018
