Can seahorses make sounds?
Seahorses make noises that sound like small clicks or pops to our ears. They do this by moving two parts of their skull against each other during feeding and courtship. We don't know if they use these clicks to communicate, but they seem more obvious during mating and courtship displays. Seahorses will swim in patterns like dances, which probably serves as some form of communication with mates or other animals.  Seahorses may also communicate through color changes. Within seconds, many seahorses can brighten or darken their colors, possibly helping them communicate health, interest, recognition or moods.