- Fish Feel: When exposed to toxins, their heart rates increase, and they take longer to resume feeding.
- Fish are intelligent: Their perception and cognition often matches and exceeds that of other vertebrates. Some will even use tools.
- Fish are sensitive: They like physical connections with other fish and like rubbing up against one another.
- Fish have good memories: Goldfish can remember an obstacle course a month later.
- Fish feel pain: They have free nerve-endings that register pain and produce pain-reducing substances like endorphins.
- Fish like to talk: They talk to each other with low-frequency squeaks detectable only by technology. Fish also communicate using sign language.
