crustacean · GBIF taxon 2225646
Blue Crab
Callinectes sapidusAlso known as Atlantic Blue Crab, Maryland Blue Crab, Chesapeake Blue Crab
Blue crabs are highly active, aggressive swimmers distinguished by their bright blue claws and paddle-shaped hind legs adapted for rapid propulsion. They play a vital role in estuarine food webs, acting as both voracious predators of bivalves and a key food source for larger marine life. Females undergo a dramatic migration to high-salinity waters to spawn, releasing millions of larvae into the ocean currents.
MarineAggressiveCrustacean
Licensed referenceWikimedia Commons / CC BY-SA 3.0 · cc-by-sa
- diet
- Omnivorous scavenger feeding on clams, oysters, fish, worms, detritus, and other crabs
- family
- Portunidae
- threats
- Overfishing, habitat degradation, water pollution, and coastal development
- life Span
- 3 to 4 years
LC
Possesses powerful claws capable of delivering a painful pinch; handle with care using tongs or from behind.
- Handling: Always pick up a crab from the very back, holding the base of its swimming paddles to avoid the claws.
- Observation: Look for them darting sideways through shallow water near salt marshes and dock pilings.
- Identification: Distinguish males from females by the shape of their abdomen: males have an inverted T shape, while mature females have a rounded dome.