Golden Midas Blenny (Ecsenius midas)

Midas Blennies spend part of their life doing a convincing impression of an anthias — schooling right alongside them in golden-orange color, picking plankton from the water column the same way — which lets a fish with zero venom or defenses borrow safety in numbers from a group predators tend to leave alone. Corner one against the rockwork, though, and it drops the act fast, turning territorial and trading the gold for a duller, mottled brown.

Care level: Easy · Temperament: Peaceful, semi-territorial · Max size: ~5" · Min tank: 30 gal · Diet: Herbivore, algae + herbivore pellets, will take meaty foods too