Saltcorner
By Bob Goemans
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Diodon (Porcupinefishes)

Diodon hystrix

Linnaeus, 1758

Spot-fin Porcupinefish

Not Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Widespread throughout tropical oceans.

Size: 30 inches (76 cm)

Natural Environment: Inhabits shallow reefs and hides during daylight hours under ledges and in crevices and usually found at depths between 6 to 100 feet (2 - 30 m) where it feeds mainly at night on benthic invertebrate.

General Husbandry: Rarely seen in the trade, and having a tannish upper body, white belly, and numerous brown spots.

Best maintained in fish-only aquariums with wide-open swimming areas, peaceful tankmates, and tankmates too large to be eaten.

Should not be housed with aggressive or fin-nipping fishes, such as groupers, dottybacks, triggerfishes or angelfishes, as this is a slow moving species.

Requires a varied diet, i.e., enriched live brine shrimp, mysis, chunky chopped fish or shrimp flesh, and/or carnivore frozen foods, along with some vegetable matter. Should have numerous daily feedings, preferably early daytime and late evenings.

Taxonomy:

    Order: Tetraodontiformes

    Suborder: Tetraodontoidei

    Family: Diodontidae

    Genus: Diodon

FYI: Will eat smaller fishes, ornamental shrimp, crabs, snails, urchins, sea stars, and worms.

Will nip the fins of slow moving tankmates.

May eat soft corals.

Mainly nocturnal.

Can inflate their bellies with air and look balloon-like.

Experience Level: Expert

Temperament: Peaceful

Diet: Carnivore

Coral Safe: Yes

Fish Safe: No

Invertebrate Safe: No

Acclimation Time: 30 minutes+

Aquarium Environment: Fish-only aquarium

Tankmates: Peaceful, and larger

Minimum Tank Size: 150 gallons

Temperature Range: 70 - 82°F (21 - 27°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Diodon hystrix (Spot-fin Porcupinefish)
Photo © Bob Fenner
Diodon holacanthus Diodon liturosus
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