The lesser blue crab is usually associated with Callinectes sapidis where they compete for food and other resources (Williams 1984). Typically, adult C. similis inhibits higher-salinity waters ( ³15ä) than C. sapidis (Guerin and Stickle 1997). However, juvenile C. similis and C. sapidis overlap considerably in estuaries where they can find refuge and abundant food sources. Fishery:Because Callinectes ornatus occupies the same habitats as the commercial species, C. sapidus, it is impacted by the crab fishery along western Atlantic coast (Hsueh et al. 1992).
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