Tomini tang

Ctenochaetus tominiensis

Also known as Tomini Surgeonfish, Tomini Bristletooth, Yellowtip Bristletooth

SaltwaterFish

Care at a glance

Temperature
75–81°F
24–27°C
pH
8.1–8.4
Adult size
6.3 in
16 cm
Minimum tank
70 gal
265 L
Temperament
Mostly peaceful
Diet
Omnivore
Breeding
No record
Rarity
Common
Reef safe
Reef safe
Family
Acanthuridae
Origin
Western Pacific reefs, from Indonesia to Fiji and the Great Barrier Reef

Overview

The Tomini tang is a small, mostly peaceful bristletooth that suits a reef tank. It is a step up from the easiest fish, best with a little experience.

Did you know

The Tomini tang's fine, brush-like teeth let it feed on the diatom film that coats live rock. Most other tangs do not bother with food that fine, so bristletooths are often chosen to keep a reef tank's rockwork clean.

Caring for the Tomini tang

Keep a single Tomini tang in at least 70 gal (265 L), and more room is always welcome. Give it an open lane for swimming and a good spread of live rock to comb for algae film and detritus. Hold the water at 75 to 81°F (24 to 27°C) with a pH of 8.1 to 8.4.

Offer nori or dried seaweed several times a week, along with small meaty foods. Reef keepers value it for cleaning up the detritus and film algae that other grazers leave behind.

The Tomini tang is territorial toward other tangs, especially other bristletooths. It is easygoing with the rest of the tank once it settles in, and it is safe with corals and invertebrates.

It handles shipping and new-tank stress fairly well for a tang. Marine ich is still a risk with any surgeonfish, so quarantine new arrivals rather than skip the step.

Good to know

The Tomini tang belongs to the bristletooth genus Ctenochaetus, named for its rows of fine, flexible, comb-like teeth. They brush algae off rock rather than scrape it the way coarser-toothed Acanthurus tangs do. It still carries the family's folding scalpel spine at the base of the tail, but it is a smaller and generally less pugnacious fish. Juveniles are tan with yellow, blue and white highlights that darken into a more solid adult pattern with a blue tail.

In the wild

The Tomini tang is native to western Pacific reefs, from Indonesia and the Philippines to Fiji and the Great Barrier Reef. It usually lives on steep drop-offs with dense coral growth, in sheltered inshore water.

Weekly picks

Tank mates

The Tomini tang is a mostly peaceful, solitary species that keeps to the middle. These picks share a community profile with it, are safe together in both directions, and overlap on water type, temperature and pH.

Check the full mix in the stocking calculator

Common questions

What size tank does a Tomini tang need?

A Tomini tang needs at least 70 gal (265 L). It spends most of its time in the middle.

What temperature and pH does a Tomini tang need?

A Tomini tang is comfortable at 75–81°F (24–27°C) with a pH of 8.1–8.4.

What does a Tomini tang eat?

A Tomini tang eats nori or dried seaweed several times a week, plus small meaty foods. It also cleans up detritus and film algae on the live rock.

How big does a Tomini tang get?

An adult Tomini tang reaches about 6.3 in (16 cm).

Related species