Tomini Tang
Ctenochaetus tominiensis
Also known as Tomini Surgeonfish, Tomini Bristletooth, Yellowtip Bristletooth
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
- Difficulty
- Medium
- Breeding
- No record
- Rarity
- Common
- Reef safe
- Reef safe
- Origin
- Western Pacific reefs, from Indonesia to Fiji and the Great Barrier Reef
- Family
- Acanthuridae
Overview
Territorial toward other tangs, especially other bristletooths, but easygoing with the rest of the tank once it settles in. Reef safe with corals and invertebrates, and valued for cleaning up detritus and film algae that other grazers leave behind. Offer nori or dried seaweed several times a week along with small meaty foods. It handles shipping and new-tank stress reasonably well for a tang, but marine ich is still a risk with any surgeonfish, so quarantine new arrivals rather than skip the step.
In the wild
Native to western Pacific reefs from Indonesia and the Philippines to Fiji and the Great Barrier Reef, typically on steep drop-offs with dense coral growth in sheltered inshore water. It is a smaller, less boisterous tang that still appreciates an open lane for swimming along with a good spread of live rock to comb for algae film and detritus. A tank of at least 265 litres (70 US gal) suits a single fish, with more room always welcome.
Good to know
Belongs to the bristletooth genus Ctenochaetus, named for the rows of fine, flexible, comb-like teeth used to brush algae film and detritus 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, though it is a smaller and generally less pugnacious fish, topping out around 16 cm. Juveniles are tan with yellow, blue, and white highlights that darken into a more solid, blue-tailed adult pattern.
Did you know
Its fine, brush-like teeth let it feed on detritus and the diatom film that coats live rock, food sources too fine for most other tangs to bother with, which is why bristletooths are often chosen to help keep a reef tank's rockwork clean.
Where to buy
Some links may not be the exact species or variety.
- LiveAquaria Freshwater and saltwater fish, inverts and corals
- Saltwaterfish.com Marine fish, corals and inverts shipped overnight
…or ask your local fish store.
Appears in
Keeping Tomini Tang?
Track water tests, reminders and stocking fit.
Related species

Kole Tang
Ctenochaetus strigosus7.1 in (18 cm)79 gal (300 L)75–81°F (24–27°C)
Chevron Tang
Ctenochaetus hawaiiensis11 in (28 cm)180 gal (680 L)75–81°F (24–27°C)
Scopas Tang
Zebrasoma scopas7.9 in (20 cm)90 gal (340 L)75–82°F (24–28°C)
Yellow Tang
Zebrasoma flavescens7.9 in (20 cm)100 gal (380 L)72–79°F (22–26°C)
Black Tang
Zebrasoma rostratum8.3 in (21 cm)119 gal (450 L)75–81°F (24–27°C)
Powder Brown Tang
Acanthurus japonicus8.3 in (21 cm)129 gal (490 L)75–81°F (24–27°C)
