from the world's big
Scientists realize that fish are sentient and intelligent, though unfortunately, they also get depressed.
Dog and cat owners and animal lovers believe that animals carry some sort of human-like thought. Some may say it’s just anthropomorphizing, but we’re pretty convinced that our pets are "happy" or "sad" or whatever we want to project on them. Obviously we can’t just ask them — at least for now — but as scientists learn more and more about animal intelligence, it’s safe to say that fewer people see our companions as acting purely from instinct. Nonetheless, even some animal lovers have trouble believing that fish are self-aware and have feelings — after all, they’re as expressionless as… (most) cats. To some scientists, though, it’s become clear that fish not only have emotions, but that they’re subject to depression.