The Blue Gregory is a hardy Caribbean damselfish with electric-blue coloring as a juvenile. Gregories are bold, active and claim a rock or cave as their territory.
Why We're Obsessed
That electric blue on a juvenile is hard to beat for the price. It's a tough little fish for a bigger, busier tank.
Care: Very hardy and reef safe with corals, but territorial and aggressive toward smaller or similar-looking fish, so add it last. Eats algae, pellets and frozen foods. Max size about 4–5". Minimum tank size: 30 gallons.