Green Spotted Puffer (Dichotomyctere nigroviridis)

Green spotted puffers can move each eye independently of the other, tracking two separate points of interest at once the way a chameleon does — a genuinely unusual trick among fish, and a useful one for a slow, deliberate swimmer that relies on spotting threats and prey from any direction rather than outrunning anything.

Care level: Moderate · Temperament: Semi-aggressive · Max size: ~6" · Min tank: 30 gal, brackish · Diet: Carnivore, snails + frozen foods