Blue button jellyfish are a type of jellyfish that live in shallow waters. They have been seen floating in the ocean and some people get stung by them. Blue button jellyfish are not dangerous to humans, but they can be to marine animals. The venomous cells on their tentacles can sting or paralyze fish and other marine animals.
Blue button jellyfish have been seen closer to shore than other types of jellyfish. They have short, soft and flat tentacles. The bell is mostly clear or blue, but it can sometimes be green. Blue button jellyfish are about 20 centimeters long and their bell is about 2 centimeters wide (about 8 inches long and 1 inch wide).