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
- Social behavior
- Solitary
- Swim level
- Middle
- Diet
- Omnivore
- Difficulty
- Medium
- 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.
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.

Coral beauty angelfish
Centropyge bispinosa
Saltwater3.9 in (10 cm) · 50 gal (190 L)72–79°F (22–26°C)
Swallowtail angelfish
Genicanthus melanospilos
Saltwater7.1 in (18 cm) · 106 gal (400 L)72–79°F (22–26°C)
Divided leopard wrasse
Macropharyngodon bipartitus
Saltwater5.1 in (13 cm) · 55 gal (208 L)72–79°F (22–26°C)
Flametail blenny
Enchelyurus flavipes
Saltwater3 in (7.5 cm) · 29 gal (110 L)72–79°F (22–26°C)
Skunk cleaner shrimp
Lysmata amboinensis
Saltwater2.4 in (6 cm) · 20 gal (75 L)73–81°F (23–27°C)
Ring cowrie
Monetaria annulus
Saltwater1.2 in (3 cm) · 20 gal (75 L)75–81°F (24–27°C)
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
7.1 in (18 cm)79 gal (300 L)75–81°F (24–27°C)Kole tang
Ctenochaetus strigosus
7.1 in (18 cm) · 79 gal (300 L)
11 in (28 cm)180 gal (680 L)75–81°F (24–27°C)Chevron tang
Ctenochaetus hawaiiensis
11 in (28 cm) · 180 gal (680 L)
7.9 in (20 cm)90 gal (340 L)75–82°F (24–28°C)Scopas tang
Zebrasoma scopas
7.9 in (20 cm) · 90 gal (340 L)
7.9 in (20 cm)100 gal (380 L)72–79°F (22–26°C)Yellow tang
Zebrasoma flavescens
7.9 in (20 cm) · 100 gal (380 L)
8.3 in (21 cm)119 gal (450 L)75–81°F (24–27°C)Black tang
Zebrasoma rostratum
8.3 in (21 cm) · 119 gal (450 L)
8.3 in (21 cm)129 gal (490 L)75–81°F (24–27°C)Powder brown tang
Acanthurus japonicus
8.3 in (21 cm) · 129 gal (490 L)
