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Fish Saltwater Care: medium Semi-aggressive

Hawaiian Whitespotted Toby

Canthigaster jactator
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Other names: Hawaiian white-spotted toby, Jactator puffer
Group: Marine fish · Family: Tetraodontidae · Origin: Central Pacific — only the Hawaiian Islands (endemic)

A small sharpnose pufferfish endemic to Hawaii, with a brown body densely covered in white spots. It grows to 9 cm; charming, but it picks at shrimp, snails and corals.

Will it suit my tank?

Last updated October 16, 2026

Temperature
24–27°C
pH
8.1–8.4
Adult size
9 cm
Minimum tank size
120 liters
Social structure
Solitary
Swimming zone
Middle
Diet
Omnivore
Breeding
Egg scatterer

Water parameters

Temperature24–27°C
pH8.1–8.4
Recommended range
Fin nipper Eats shrimp Eats snails May nip corals

Overview

October 16, 2026 · Suggest an edit

The Hawaiian whitespotted toby is a small Canthigaster species found only in the Hawaiian Islands. Its chocolate-brown body is covered with dense, small white spots; the blue lines seen in the similar-looking Solandri toby are absent in this species. In the wild it feeds on a wide variety of foods on lagoon and outer reefs, such as sponges, algae, worms, small crabs, shrimp and sea urchins. Because commercial aquarium collection in Hawaii has long been restricted by court and permit processes, it is rarely found on the market. Toxin note: Its skin and internal organs contain tetrodotoxin; it must not be eaten.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 120 liters; plenty of hiding places and rock crevices to sleep in.
  • Salinity specific gravity 1.023–1.026, pH 8.1–8.4, temperature 24–27°C.
  • It is sensitive to copper treatment; be careful in quarantine.
  • Reef-safe with caution, on the risky side: It eats small shrimp, hermit crabs, snails and tube worms; it nips some corals.

Diet

October 16, 2026 · Suggest an edit

Omnivorous. Frozen mysis, chopped mussels and shrimp, small snails in their shells and seaweed; offer shelled food a few times a week to wear down its teeth.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Curious and active; it may bite the fins of slow, long-finned fish. It may fight with individuals of its own species.

Good companions: Damsels, clownfish, tangs, wrasses, dwarf angelfish.

Avoid: Seahorses, pipefish, mandarinfish, ornamental shrimp, snails, a second pufferfish.

A short profile for this species

The Hawaiian Whitespotted Toby page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026