RT Book, Section A1 Zafren, Ken A1 Thurman, R. Jason A1 Jones, Ian D. A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181051146 T1 Cephalopod Envenomation T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1181051146 RD 2024/03/29 AB There are over 750 species of cephalopods found throughout the oceans worldwide. Cephalopods are members of the phylum mollusca and include cuttlefish, squid, octopuses, and the nautilus. Several species of cephalopods are known or thought to be venomous, but only the blue-ringed octopus, genus Hapalochlaena, poses a significant threat to humans.