1. Hook shrimp refers to the suborder Hook shrimp in the Clapoda. Hooked shrimps are mostly left and right flat, 5 to 40 mm long, distributed in tropical, temperate and polar waters. The harvest season of hooked shrimp is from February to May, and the harvest time is mostly in the night without wind or breeze.

2.Zombiculidae is the general name of Zombiculioidea, including 6 families and subfamilies, which are widely distributed in the oceans of the world, including tropical, temperate and frigid zones. Habitat in intertidal zone and subtidal zone, a few species are distributed in deep water, and many species live in brackish water and fresh water in estuaries.