Puffer fish - and they can puff up. Brigid really loved these fish because she'd heard somewhere that they were monogamous (they're not...). We'd see them while snorkeling or scuba diving. That was long ago - we left Grand Cayman in 1981(!) and last time we visited was in 1986 or '87. Aiming to go back next summer!
Some puffer fish have spikes - Here's what they look like puffed for defense.
Comments