👉 Euryhaliotrema is a genus of marine gastropod mollusks in the family Calliphoridae, which includes the common crayfish (Arctocephalus). These creatures are known for their large size and distinctive coloration. They have a long snout and a segmented body with eight arms, each armed with an anal fin. Euryhaliotrema is commonly found in freshwater and marine environments, including lakes, rivers, and estuaries.