Chevron Tang (Ctenochaetus hawaiiensis)

Chevron Tang Ctenochaetus hawaiiensis
Name	Chevron Tang
Name Lat.	Ctenochaetus hawaiiensis
Family	Surgeonfishes
Family lat.	Acanthuridae
Order	Surgeonfishes
Order lat.	Acanthuriformes
Origin	Pacific
Habitat	Reefs
Diet	Herbivore
pH	8.1-8.4
Hardness	8-10 °KH
Behavior	Semi-aggressive
Keeping	Individual
Reef Compatible	Yes
Care Level	Moderate
Life Span	5-8 years
Protection	No
Metric Units
Size	24 cm
Temperature	24-28 °C
Salinity	33-36 ‰
Aquarium	~ 750 l
US Units
Size	10"
Temperature	75-82 °F
Salinity	1.020-1.025 sg
Aquarium	~ 200 gal

Distribution and habitat

The range of Ctenochaetus hawaiiensis is the Pacific Ocean from Australia through Micronesia to Hawaii and the Marquesas, where they live on rocky and coral reefs to depths of 60m.

Maintenance

They require a well-structured aquarium with plenty of swimming space and a reef structure (hiding, resting and retreat possibilities) with living stones which they can graze on and which act like a biological filter. Only lime-rich, heavy metal-free sands, gravels, stones or sea sand of various grain sizes may be used as substrate

Filters, skimmers and heaters are necessary to ensure water quality, as well as pumps to simulate tides, swells and bottom currents. Lighting must correspond to the species-appropriate day-night rhythm of the animals

Salinity: 33-36 ‰	pH value: 8.1-8.4
Carbonate hardness: 8-10 °KH	Nitrate content: 2-8 mg/l
phosphate content: 0.01-0.1 mg/l	nitrite content: 0.0-0.05 mg/l

For salinity, an average value should be aimed for, which may only vary slightly by +/- 0.5 ‰. Ammonia and ammonium must not be measurable. Special attention must be paid to constantly good water quality.

Diet

They feed mainly on plant food, such as algae and seaweed. The change of diet does not always succeed without problems. The diet consists mainly of commercially available algae and kelp (e.g. nori, caulerpa, kelp) supplemented with high-quality flake or granulated food for herbivores or a commercially available vitamin-enriched frozen special food mix for herbivores. Live or frozen food such as artemia, krill or mysis should only be offered in small quantities. Plant food strengthens the immune system and reduces aggression. Fine coral sand serves as a digestive aid for them

It is recommended to feed small portions several times a day. Regular and varied feeding promotes health and prevents deficiency symptoms.

Behaviour and compatibility

It is recommended to keep them individually. They behave very territorial within the species and towards other surgeonfishes. Keeping them in pairs is only possible in a much larger and richly structured tank. To avoid ranking fights, they should be put into the aquarium at the same time. Towards other fishes they behave peacefully.

Sex dimorphism

There are no known external distinguishing characteristics.

Reproduction and breeding

There are no known reports of successful breeding in the aquarium.

Important

Juveniles have 2-3 years of juvenile plumage that is distinctly different from adult coloration.

Characteristic of surgeonfishes is the scalpel located on either side of the caudal peduncle, which can be unfolded from its pocket by curving the body. As coral reef dwellers, they should not be maintained in a fish-only aquarium.

If different species are kept together, care should be taken to match the fish in terms of water quality and temperature requirements and social behavior, and to ensure that the setup meets the needs of all species kept together. New fish to be introduced must be acclimated slowly to the water in the aquarium.

Further literature can be found in your pet store.

References

Text: Werner Winter; Image: Franz Lowak

Source: KUITER, DEBELIUS (2007): Atlas der Meeresfische: Die Fische an den Küsten der Weltmeere, Kosmos Verlag; BAENSCH & DEBELIUS (2006): Meerwasser Atlas Bd. 1, Mergus Verlag; ENGELMANN (2005): Zootierhaltung - Tiere in menschlicher Obhut: Fische, Verlag Harri Deutsch

• Gemäß § 21 Abs. 5 Tierschutzgesetz idgF