Pygmy Possum Wrasse Care Guide
Wetmorella nigropinnata is a small, secretive Indo-Pacific reef wrasse that hides in caves and crevices, reaching about 8 cm.
Compiled by Aquairi from published sources · Published · Updated
Overview
Wetmorella nigropinnata, the sharpnose or pygmy possum wrasse, is a small reef-associated fish of the family Labridae from the Indo-Pacific. It is a secretive species reaching about 8 cm in total length, typically grayish-brown to reddish-brown with light yellow markings behind the eye and on the caudal peduncle.
Taxonomy
- Family: Labridae
- Genus: Wetmorella
- Scientific name: Wetmorella nigropinnata
Habitat
The species ranges across the Indo-Pacific, from the Red Sea to the Marquesan and Pitcairn Islands, north to the Ryukyu Islands and south to the southern Great Barrier Reef and New Caledonia. It inhabits caves and crevices of lagoon and seaward reefs at depths of 0-36 m.
Tank requirements
- Minimum tank volume: 80 L
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- Lifespan: 8-15 years
Diet
The species feeds on benthic invertebrates. In the aquarium this carnivorous wrasse is offered small meaty foods, and it is reef-safe, not harming corals.
Compatibility
This is a peaceful but reclusive wrasse that spends much of its time among caves and crevices. It is best kept in a mature reef aquarium with plentiful live rock and away from large, aggressive species that would outcompete it for food.
Breeding
The species is oviparous with distinct pairing during breeding. Juveniles display two broad pale body bars. Captive breeding is rarely reported.
Conservation status
According to FishBase, Wetmorella nigropinnata is assessed as Least Concern on the IUCN Red List (assessed 2009).
Pygmy Possum Wrasse Breeding Guide (Wetmorella nigropinnata)
Overview
The pygmy possum wrasse (Wetmorella nigropinnata) is a tiny Labridae wrasse of the subfamily Cheilininae, reaching only about 8 cm in total length. It has a wide Indo-Pacific range from the Red Sea to the Marquesan and Pitcairn islands, north to the Ryukyu Islands and south to the southern Great Barrier Reef and New Caledonia, at depths of 0 to 36 m. It is a secretive species inhabiting caves and crevices on lagoon and seaward reefs.
Sexing
No external sexing key is documented for this species in the consulted sources. Its reclusive, cave-dwelling habits mean it is rarely observed even in the wild, and FishBase provides no dimorphism data, so reliable visual sexing cannot be described.
Spawning Behavior & Trigger
FishBase records the species as oviparous with distinct pairing during breeding. Beyond this pairing behaviour, no specific spawning sequence, site preference or trigger is documented for Wetmorella nigropinnata in the consulted sources, and no captive spawning has been reported.
Egg & Fry Care
The consulted sources do not document egg type, larval form or any fry-rearing information for this species. As a small reef labrid it is presumed to follow the general oviparous wrasse pattern, but specific data are absent, so no rearing guidance can be given.
Common Challenges
Its extreme shyness, tiny size and reliance on dark caves and crevices make even routine observation difficult, and the absence of documented reproductive detail means there is no basis for a captive breeding attempt. It remains a wild-collected species in the aquarium trade.