Green Spotted Puffer

Dichotomyctere nigroviridis

Animalia›Chordata›Actinopterygii›Tetraodontidae

📍 Southeast Asia & Sri Lanka

Vivid green-and-black spotted puffer. Requires brackish conditions as an adult. Highly intelligent and inquisitive — needs enrichment and varied diet including snails to wear down its ever-growing beak.

Size6"

Min Tank30g

aggressive

Zonemid

Care Guide

Diet

Green spotted puffers are obligate carnivores requiring a diet of hard-shelled prey to naturally wear down their continuously growing beak. Feed live or frozen snails (mystery snails, ramshorn snails), small crustaceans, and bloodworms once daily in small portions. Supplement occasionally with quality carnivore pellets, but prioritize whole prey items for optimal beak maintenance and nutrition.

Behavior

Highly intelligent and curious fish that require substantial environmental enrichment to prevent boredom and aggression. They are solitary and territorial, becoming increasingly aggressive toward tankmates as they mature, particularly toward other puffers and small fish. Expect interactive behavior—they recognize their keeper and will investigate decorations and food sources with obvious interest.

Breeding

Breeding green spotted puffers in captivity is extremely rare and poorly documented. No reliable breeding protocols exist for home aquarists, and sexual dimorphism is not clearly established. Captive breeding is not a realistic goal for hobbyists.

Tank Mates

Gold Mystery Snail

Provides natural prey item and enrichment; puffer will hunt and consume over time, which is natural behavior

good

Ramshorn Snail

Excellent food source for beak maintenance; puffer will actively hunt them

good

Assassin Snail

May survive longer due to hardened shell, but puffer will still attempt predation; monitor closely

caution

Malaysian Trumpet Snail

Provides enrichment and natural prey; helps maintain beak health

good

Common Diseases

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots on body and fins, lethargy, rubbing against decorations, rapid breathing

Treatment

Raise temperature gradually to 28-30°C, perform 25% water changes daily, use aquarium salt (1 tsp per gallon) or commercial ich treatment; maintain excellent water quality

Fin Rot

Symptoms

Frayed or disintegrating fin edges, discoloration at fin bases, lethargy

Treatment

Perform frequent water changes, improve water quality, use antibacterial medication if severe; ensure adequate filtration and remove any sharp decorations

Beak Overgrowth

Symptoms

Inability to eat, visible beak protrusion, behavioral changes, weight loss

Treatment

Provide abundant hard-shelled prey (snails, small crustaceans); in severe cases, manual trimming by experienced aquarist may be necessary; prevent through consistent hard-prey diet

Bacterial Infection

Symptoms

Open sores, cloudy eyes, loss of appetite, color fading, fin damage

Treatment

Perform daily 25-30% water changes, maintain optimal water parameters, use broad-spectrum antibacterial treatment; isolate if possible to prevent spread