Green Marble Shrimp

Geographical Origin and Habitat: Widely distributed in the tropical Indo-Pacific, including Indonesia, the Philippines, Ryukyu, and the Great Barrier Reef. Settles in lagoons, rocky reefs, and shallow coral rubble.

Taxonomy: Member of the family Hippolytidae. Features a robust, compressed body with a rigid carapace, hair-like dorsal tufts, and spiny legs. Reaches 4-5 cm.

Social Behavior: Cryptic and light-avoiding. Spends the day hidden deep in rock crevices, emerging only at night to explore and forage for food.

Coloration and Sexual Dimorphism: Mostly dark green, olive-green, or brown-green during the day with blue eyespots for camouflage. Shifts to reddish tones at night. Adult males develop elongated cheliped legs.

Tank Setup: Suitable for tanks of 15 gallons or larger. Live rock is essential, arranged to form caves and shaded overhangs where the shrimp can hide away from intense lighting.

Diet and Feeding: Omnivore. Consumes organic detritus, algae, leftover fish food, and small micro-invertebrates. Eagerly accepts sinking pellets, frozen mysis, brine shrimp, and flakes.

Water Quality: Keep reef parameters stable: SG 1.020-1.025, pH 8.1-8.4, temperature 22-28°C. Sensitive to high nitrates and requires strictly zero copper levels.

Compatibility and Tankmates: Not 100% reef-safe. May nip at small coral polyps or zoanthids if underfed. Otherwise compatible with peaceful reef fish.

Aquarium Breeding: Females carry eggs under their abdomen. Planktonic larval stages are highly delicate and usually perish in standard home filtration systems.

Risks and Diseases: Low iodine or calcium leading to failed molts. Highly vulnerable to predation during the post-molt phase when its new shell is soft.