Common Black Sea Urchin

Marine Invertebrate — Echinometra mathaei

The Common Black Sea Urchin is a hardy algae-grazing cleanup crew member known for its dark coloration and long spines. It helps control algae growth on rockwork while adding an interesting and active presence to the reef aquarium.

CARE LEVEL: Beginner–Intermediate

MAX SIZE: Up to 4" (10 cm)

MIN. TANK SIZE: 30 Gallons

TEMPERATURE: 72–78°F (22–26°C)

DIET: Herbivore

FEEDING: Primarily feeds on algae and biofilm; supplement with nori or algae wafers if natural algae is limited

TEMPERAMENT: Peaceful

COMPATIBILITY: Reef safe and generally peaceful; may knock over loose rockwork or unsecured corals while grazing, so secure decorations and frags