Ghost Cardinalfish-Facts and Photographs

Ghost Cardinalfish Nectamia fusca

The Ghost Cardinalfish Nectamia fusca has not been previously documented in Tanzania or African waters. They are one of the few species of saltwater fish that are mouth brooders. Several specimens were found while diving off the Dar es Salaam Yacht Club on a night dive in shallow waters. They can be easily confused with the Samoan Cardinalfish, but there are subtle differences that are easy to pick out in images.

Ghost Cardinalfish Nectamia fusca

APPEARANCE

The Ghost Cardinalfish has proportionally large eyes and have two dorsal fins. The dorsal and caudal fins are translucent. The body is a silver colour and there is a light black bar in the caudal area which is sometimes displayed. Underneath the eye there is a thin black line extending backwards. At night they appear semi translucent.

Ghost Cardinalfish Nectamia fusca

IN THE WILD

We have only seen this species in the shallows above 3 meters. They are nocturnal feeders and have been photographed on a night dives in the shallows in Msasani bay in Dar es Salaam, Tanzania. They were seen on a mixed coral/rubble area adjacent to sea grass beds. The are usually seen singularly and are quite cryptic and hug the bottom.

Ghost Cardinalfish Nectamia fusca

HABITAT

The Ghost Cardinalfish is found across the Indian ocean and in the west Pacific. They are found between depths of 1-3 meters. Previously they were not documented on the African coast. It is not known how far their range extends on the African coast.

Ghost Cardinalfish Nectamia fusca

DIET

The Ghost Cardinalfish are nocturnal feeders , feeding mainly on zooplankton and small benthic organisms.

Ghost Cardinalfish Nectamia fusca

REPRODUCTION

During breeding pairs are formed and after performing a mating dance, the eggs are laid by the female and fertilized by the male. The male then collects the fertilized eggs and carries the eggs in his mouth until they hatch. During this time the male cannot feed. Towards the end of the incubation period the males become quite skinny making the protruding mouth more noticeable. This can result in cannibalism with the male eating some of the eggs. The images in this post appear to be a male with eggs in his mouth.

Ghost Cardinalfish Nectamia fusca

AQUARIUMS

Ghost Cardinalfish are probably not commonly kept in aquariums. Some cardinalfish have been bred in captivity by breeders such as Orafarm where they are occasionally available.

Ghost Cardinalfish Nectamia fusca

Purchasing captive bred fish takes the pressure off of wild populations and if one can do so one should.

Ghost Cardinalfish Nectamia fusca

READ OUR OTHER POSTS ON CARDINALFISH HERE

GHOST CARDINALFISH CLASSIFICATION

Kingdom:Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Apogonidae
Genus: Nectamia
Species:N. fusca

LITERATURE CITED

EQUIPMENT USED

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