|Latin name||Thalassoma amblycephalum|
|Local name||Bluntheaded wrasse|
|Family||Labridae - Thalassoma|
|Origin||East Indian Ocean, West Indian Ocean, Australia, Japan, Indonesia, East Pacific, Central/West Pacific|
|Max length||16 cm (6,3")|
|Minimum volume||800 cm (211 gal)|
|Suitable for aquarium||Suitable with care|
|Reef safe||Reef safe with caution|
|Aggressiveness||Might be aggressive towards other species|
Zooplankton (Cyclops, pods...)
Small crustaceans (Krill, mysis, artemia...)
Larger crustaceans (Shrimp, crabs...)
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 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 must be fed with an appropriately varied diet.
This species requires frequent feeding, at least a couple of times per day.
This species can live as a pair (male and female).
This species needs good hiding places, for example, between live rocks.
This species revels in swimming and requires an aquarium with ample space.
This species can be aggressive if they are not provided with adequate space.
This species can change gender from female to male.
When a male is needed, a female changes sex and takes on the role.
This species can be used to combat Pyramid snails.
One can of course be unlucky in having an individual that refuses to eat them.
This species is able to remove parasites from fish.
It does not have a great impact on a large outbreak of marine ich (Cryptocaryon), for example, but it contributes towards keeping fish parasite free.
Constant cleaning can stress the fish in the aquarium, so one should not add this fish which removes parasites, if the fish are already weakened through other causes.
Not all specimens actively clean fish.
Thalassoma species are beautiful both as juveniles and as adult fish, even though there is quite a difference in appearance. On the whole, they quickly grow too large for most aquaria and are therefore often offered for sale.
Depending on size they live on everything from Artemia to larger invertebrates like snails, crustaceans and sea urchins. They are well able to smash larger crustaceans on rocks to get pieces small enough to swallow.
Large individuals can be extremely aggressive towards other fish and will happily eat the smaller ones.
They should really be fed three times daily, as they are very active, which incidentally, means they require a lot of swimming space.
Although these Wrasses often dig themselves into the sand, a sandy substrate is not absolutely necessary for them to thrive.
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.
Bob Fenner. Wrasses of the Genus Thalassoma - 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.