Arc-eyed Hawkfish (Paracirrhites arcatus)

Arc-eyed Hawkfish Paracirrhites arcatus
Name	Arc-eyed Hawkfish
Name Lat.	Paracirrhites arcatus
Family	Hawkfishes
Family lat.	Cirrhitidae
Order	Basses
Order lat.	Centrarchiformes
Origin	Indo-West Pacific
Habitat	Lagoons, seaward reefs
Diet	Carnivore
pH	8.1-8.4
Hardness	8-10 °KH
Behavior	Aggressive
Keeping	Individual
Reef Compatible	With caution
Care Level	Easy
Life Span	N/A
Protection	No
Metric Units
Size	14 cm
Temperature	24-28 °C
Salinity	33-36 ‰
Aquarium	~ 250 l
US Units
Size	6"
Temperature	75-82 °F
Salinity	1.020-1.025 sg
Aquarium	~ 65 gal

Distribution and habitat

The distribution area of Paracirrhites arcatus is the Indian and Pacific Ocean, from East Africa to Hawaii. They live there preferentially in small-branched corals (Stylophora, Pocillopora, Acropora) in lagoons and on outer reefs.

Maintenance

They need a well-structured aquarium with a reef structure (hiding, resting and retreat possibilities) and with living stones that act like a biological filter as well as coral sticks. Only lime-rich, heavy metal-free sands, gravels, stones or sea sand 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 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 are voracious lurkers that prefer to eat shrimp, crustaceans and small fish. The change of food is unproblematic. The food supply should consist of a combination of live and frozen food, such as artemia, mysis, shrimp and krill, with chopped fish, mussel and shrimp meat or a commercially available frozen food mixture enriched with vitamins, supplemented with live food shrimp. It is recommended to feed larger portions 1-2 times a day.

Regular and varied feeding promotes health and increases resistance.

Behaviour and compatibility

They choose hiding places (corals) from which they can overlook as large an area as possible. They behave very territorial and defend their territory emphatically. Keeping a pair is only possible in a much larger, richly structured aquarium. They should be the last to be introduced into the aquarium, as they often behave aggressively even towards new additions.

Sex dimorphism

They are protogynous hermaphrodites, i.e. males develop from functional females when needed. No external distinguishing characteristics are known.

Reproduction and breeding

Spawning takes place in the evening or at night. During this process, the fish catapult themselves synchronously to the water surface and then immediately return to the starting point

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

Important

Their coloration and pattern is very variable depending on the origin, but always with an arc ring behind the eye. They are very jumpy, especially when spawning, so the aquarium should be well covered. As reef dwellers they should only 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: 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