Blue-spotted Puffer

Geographic Origin and Biotope: Broadly distributed in the tropical Indo-Pacific, from the East African coast and Seychelles to Hawaii, north to Japan, and south to the Great Barrier Reef. Inhabits coral-rich reefs and sandy lagoons at depths of 10 to 36 meters.

Taxonomy and Morphology: Belongs to the genus Canthigaster. Grows to a maximum length of 11 cm (4.3 inches). Features a round body, scaleless skin, and a beak formed by fused teeth.

Social Behavior: Semi-aggressive. Territorial, patrolling a small home range singly or in pairs. Uses its pectoral fins to hover and maneuver slowly around rocks.

Coloration and Sexual Dimorphism: Orange-brown body covered in bright neon-blue spots. Displays radiating blue lines around the eyes. No visible sexual dimorphism.

Aquarium Setup: Needs at least 120 liters of volume with plenty of live rock to explore and caves for sleeping. Good filtration is necessary due to waste production.

Diet and Feeding: Omnivorous. Crucial to feed hard-shelled foods (snails, clams on the half shell, small crabs) to prevent beak overgrowth. Accepts mysis, brine shrimp, krill, nori, and spirulina.

Water Quality: Hardy and resilient. Target parameters: temperature 24-26°C (75-79°F), pH 8.1-8.4, specific gravity 1.020-1.025, GH 15-25, and KH 8-12.

Compatibility and Tankmates: Reef-safe with caution. Will nip fins of slow, long-finned fish and bite coral polyps, gastropods, and ornamental shrimp. House with fast, active tankmates.

Aquarium Reproduction: Rare in captivity. Demersal spawners laying eggs in small nests. Rearing pelagic larvae is difficult.

Risks and Diseases: Highly toxic if eaten (tetrodotoxin). Can inflate itself if stressed. Never catch with a net; always use a solid cup to transfer.