Hemigrapsus sanguineus | 水產百科網

Hemigrapsussanguineus,theJapaneseshorecraborAsianshorecrab,isaspeciesofcrab...theinvadingcrab.ThismaybeduetothemouthsoffishadaptingtothesizeofH.sanguineusbecausetheyarethemostabundantfoodsource.

Species of crab

Hemigrapsus sanguineus, the Japanese shore crab or Asian shore crab, is a species of crab from East Asia. It has been introduced to several other regions, and is now an invasive species in North America and Europe. It was introduced to these regions by ships from Asia emptying their ballast tanks in coastal waters.

H. sanguineus has a squarish carapace, 2 inches (50 mm) in width, with three teeth along the forward sides; its pereiopods are marked with alternating light and dark bands.[2] The males have a bulb-like structure at the base of the movable finger on their claws. Other distinguishing features include three spines on each side of the carapace. Adult sizes range from 35–42 mm width.[3] These crabs are opportunistic omnivores that tend to favor other animals over algae....