fish endo

Is A Bony Fish Endothermic? Osteichthyes, or bony fish, are ectothermic, meaning they are cold-blooded. This means that they can’t generate any heat inside their own bodies, and… Are fish endo or exothermic? Warm-blooded animals are endothermic, meaning they can conserve heat and keep their body temperatures higher than that of the surrounding environment. Until