|Latin name||Hologymnosus doliatus - (Lacepède, 1801)|
|Local name||Pastel ringwrasse|
|Family||Labridae - Hologymnosus|
|Origin||East Indian Ocean, West Indian Ocean, Australia, Japan, Indonesia, East Pacific, Central/West Pacific|
|Max length||50 cm (19,7")|
|Minimum volume||1500 cm (396 gal)|
|Suitable for aquarium||Suitable with care|
|Reef safe||Reef safe with caution|
Small crustaceans (Krill, mysis, artemia...)
Larger crustaceans (Shrimp, crabs...)
This species grows very quickly if fed well.
This species is known to jump out of open aquaria.
This species likes eating snails whenever possible.
This spicies might be a threat to smaller fishes.
This species like to move rocks and sometimes corals in the search for food.
This species poses a threat towards shrimps and crabs etc., which are relatively small.
This species needs a very large aquarium when fully grown.
Exactly how big the aquarium should be is hard to say, but the size of this species is such, that it cannot normally be kept in a home aquarium.
This species is very sensitive during transportation and acclimatizing into the aquarium.
This species needs a minimum of 2 inch (5 cm) of sand in the aquarium bottom, so it can dig itself down when afraid or needing to sleep.
This species revels in swimming and requires an aquarium with ample space.
Several specimen of this species can coexist in the same aquarium, provided they are introduced simultaneously.
This species can change gender from female to male.
When a male is needed, a female changes sex and takes on the role.
Hologymnosus species are very active and relatively large, they therefore need a lot of space. Has one space enough, these fish are well suited to aquarium life.
They cannot crush prey like many other Wrasses, but eat a range of invertebrates and fish, as long as they can be swallowed whole. Occasionally they can be observed smashing up their prey on rocks, into smaller pieces.
They dig themselves into the sand when feeling threatened or needing to sleep. When they are transported without sand in the container, they can sustain injury around the mouth. When selecting fish in the shop, this must be checked for.
Wrasses are nearly always seen in reef aquaria, since many of the species are both attractive and useful in battling a range of unwanted invertebrates like i.e. flatworms, pyramide snails.
These fish live of everything from zooplankton to large crustaceans, sea urchins and the like.
The needs and behaviour of Wrasses vary greatly, so it is vital to familiarize oneself with the specific species before buying one.
|Distribution||Indo-Pacific: East Africa south to southern Natal, South Africa (Ref. 4392) and east to Samoa and the Line Islands.|
|French common names||
|English common names||
Pastel slender wrasse
Bob Fenner. Genera Hemigymnus and Hologymnosus Wrasses - Wet Web Media - (English)
Scott W. Michael. 2009. Wrasses and Parrotfishes (Reef Fishes Series Book 5) - TFH Publications / Microcosm Ltd. - (English)
"Minimum volume" indicates the size of the tank needed to house this species under optimal conditions.
This is based on a medium size animal, which you want to keep for several years.
It might be possible to keep smaller specimens for a limited period in a smaller tank. A larger tank might be needed for fully-grown specimens.
"Hardiness" indicates how resistant this species is to disease and how well i tolerates bad conditions in general.
Some species doesn't handle transportation very well, but that doesn't mean that the species isn't hardy under the right conditions.
In this case, a "normal" aquarium is a reef aquarium with mixed corals or a fish only aquarium with an approximately salinity of 1.026 (sg) and a temperature close to 26°C.
Species requiring more than a 4000-liter tank are considered not suitable for home aquarium.
Special aquariums may cover tanks with low salinity, sub-tropical temperature, deep sand bed, sea grass etc.
Always reef safe: No sources indicate that this species will harm corals or other invertebrates.
Often reef safe: Only a few aquarists has reported problems keeping this species with corals and other invertebrates.
Reef safe with caution: This species may be a threat to some types of invertebrates.
Reef safe with luck: Most specimens will harm corals and/or other invertebrates, but you might be lucky.
Not reef safe: This species is a threat to most corals and/or other invertebrates.