Damselfish May Be More Aggressive Than You Think

"How aggressive are damselfish, pound for pound? As it turns out, divers invading their space is not the only thing damselfish exhibit aggression over. I don’t blame them for defending their territory when I’m trying to get a shot. That’s common, and can be comical. The species in our waters vary in size, color and behavior. There is an excellent, detailed chapter on all the damselfish species in the REEF Fish Behavior book.

The threespot damselfish is the focus of our look today, since they...