Is a box jellyfish endothermic or ectothermic?

Answer 1

Because box jellyfish, as with all other cnidarians, do not have blood, or a circulatory system, they can not be considered "cold-blooded." However, they are ectotherms whose body temperatures are equal to the temperature of the environment, which is usually very warm, as almost all box jellyfish are restricted to tropical waters.

Answer 2

Jellyfish are coldblooded because the have no blood organisms.

Answer 3

Jellyfish cannot produce heat, so they are ectothermic.