Yellowbreasted Wrasse (Anampses twistii)

Yellowbreasted Wrasse Anampses twistii
Name	Yellowbreasted Wrasse
Name Lat.	Anampses twistii
Family	Wrasses
Family lat.	Labridae
Order	Wrasses & Relatives
Order lat.	Labriformes
Origin	Indo-Pacific
Habitat	Lagoons, seaward reefs
Diet	Carnivore
pH	8,1-8,4
Hardness	8-10 °KH
Behavior	Peaceful
Keeping	Pair, harem
Reef Compatible	With caution
Care Level	Difficult
Life Span	N/A
Protection	No
Metric Units
Size	16-18 cm
Temperature	22-28 °C
Salinity	33-36 ‰
Aquarium	~ 550 l
US Units
Size	7"
Temperature	72-82 °F
Salinity	1.020-1.025 sg
Aquarium	~ 140 gal

Distribution and habitat

The distribution area of Anampses twistii is the Indian and Pacific Oceans, from the Red Sea and East Africa to Samoa and the Marshall Islands. They live on nearshore reefs and in lagoons with coral growth.

Maintenance

They need a well structured aquarium with plenty of swimming space and a reef structure (hiding and covering possibilities) with living stones, which act like a biological filter and whose growth they can graze on, as well as sand areas, from fine, at least 10 cm deep sand (no coral rubble!)

Only calcareous, heavy metal-free sands, gravels, stones or sea sand may be used. Filters, skimmers and heaters are necessary to ensure water quality, as well as pumps to simulate tides, swells and bottom currents. Lighting must be appropriate for the species' day-night rhythm

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 on small crustaceans, mollusks and plankton. They do not always succeed in changing their diet without problems. The food supply for these slow eaters should consist of a combination of plankton, mysis, shrimp, artemia and cyclops, plus chopped clam, squid and crab meat or a vitamin-enriched frozen food mix. High-quality flake and granulated food is also often accepted after a period of acclimation

It is recommended to feed small portions several times a day. This reduces intra-species aggression and protects lower animals in the aquarium. Regular and varied feeding promotes health and increases resistance.

Behaviour and compatibility

The young fish, mostly females, are peaceful among themselves and can be kept without problems. With the sex change to male the aggression increases. Only one male should be kept with one or more females. Towards other fish they behave peacefully.

Sex dimorphism

They are protogynous hermaphrodites, meaning that most males develop from functional females and are referred to as "secondary males". External sexual characteristics are not known.

Reproduction and breeding

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

Important

Overnight and when threatened, they often bury themselves in the sandy substrate. Juveniles usually live in caves or corals and act as cleaner fish. Care should be taken when keeping them together with tubeworms, snails and crabs, as these may be considered food

As reef dwellers, they should be kept together with corals and not in a fish-only aquarium.

If different species are kept together, care should be taken to ensure that the fish match each other in terms of water quality and temperature requirements and social behavior, and 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; ENGELMANN (2005): Zootierhaltung - Tiere in menschlicher Obhut: Fische, Verlag Harri Deutsch

• Gemäß § 21 Abs. 5 Tierschutzgesetz idgF