|Latin name||Hemigymnus melapterus - (Bloch, 1791)|
|Local name||Blackeye thicklip|
|Family||Labridae - Hemigymnus|
|Origin||East Indian Ocean, West Indian Ocean, Australia, The Red Sea, Indonesia, East Pacific, Central/West Pacific|
|Max length||37 cm (14,6")|
|Minimum volume||2000 cm (528 gal)|
|Suitable for aquarium||Experience, preparation and extra care required|
|Reef safe||Not reef safe|
|Aggressiveness||Might be aggressive towards similar species|
Small crustaceans (Krill, mysis, artemia...)
Larger crustaceans (Shrimp, crabs...)
This spicies might be a threat to smaller fishes.
This species requires feeding 4 or more times a day.
Hard to give this species the correct nutrition and is therefore hard to keep alive.
This species eats shrimps, crayfish, crabs, small bivalves, sea urchins, snails and similar.
The juvenile form of this species is very colourful, but it becomes dull as it becomes larger.
This species searches through the sand for food, which can make the water cloudy and shakes up detritus.
In an aquarium their natural food source in the sand is quickly exhausted.
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.
There is a greater chance of success with this species if one can supply a living feed to allow it to adapt to the tank.
This species revels in swimming and requires an aquarium with ample space.
This species can change gender from female to male.
When a male is needed, a female changes sex and takes on the role.
Fish in the Hemigymnus grow to be very large, and therefore require a spacious tank.
They are typically fairly peaceful towards other fish, but do pose a threat to many invertebrates.
They must be fed four times a day, which requires good filtration.
Before purchasing these fish one must be aware that they often cover corals with sand, in their search for food.
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: Red Sea and East Africa to Micronesia, Samoa (Ref. 2334), and Polynesia (Ref. 9823).|
|English common names||
Blackeye thicklip wrasse
Blackedge thicklip wrasse
|French common names||
Labre à grosses lèvres
|German common names||
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.