Fishes, most of the invertebrates and amphibians are examples of ________ animals?

Explanation

Ectotherms depend largely on environmental heat to regulate their body temperature, so fishes, most invertebrates and amphibians are ectothermic animals. Endotherms generate substantial internal heat, as mammals and birds do. Homeotherms are animals that maintain a relatively constant body temperature, not the group described here.