Dorsal spines (total): 2; Dorsal soft rays (total):
6-7; Anal spines: 0; Anal soft rays: 12; Vertebrae:
43 - 46. Gogo ornatus is distinguished from
other members of Anchariidae by a highly mottled pigmentation
pattern consisting of contrasting light and dark patches
vs. uniform colouration with or without isolated small
scattered dark spots or subtle mottled brownish-gray
colouration. It can be further distinguished from
Gogo brevibarbis in having unicuspid teeth
on the upper and lower jaws vs. bicuspid; and a smaller
eye, 9.2-13.6% of head length vs. 15.9% (Ref. 56142).
It can be distinguished from Gogo arcuatus
in having a smaller eye, 9.2-13.6% of head length
vs. 17.7-18.0%; and a straight dorsoposterior margin
of the dorsal fin vs. concave. Habitat:
Gogo ornatus is found in a clear, clean, and
well oxygenated river with a substrate composed of
sand and gravel, with large scattered boulders. Remarks:
Gogo ornatus is only known from the Mangoro
River drainage on the east coast of Madagascar. The
estimated Extent of Occurrence is less than 5,000
km² and it is known from only a single location.
Continuing habitat loss/decline due to deforestation
of the catchment, and declines due to competition/predation
from introduced exotic fish species are suspected.
This anchariid catfish is therefore listed as endangered.
Deforestation leading to loss of habitat through increased
sedimentation and predation/competition from exotic
invasive species are possible threats to this species
Mangoro River drainage on east coast of Madagascar.
Type Locality: Mangoro River, 200
meters upstream of ferry crossing on road to Marolambo,
Toamasina Province, Madagascar.
Ng, H.H. and J.S. Sparks,
2005. Revision of the endemic Malagasy catfish family
Anchariidae (Teleostei: Siluriformes), with descriptions
of a new genus and three new species. Ichthyol. Explor.
Freshwat. 16(4):303-323. Froese, R. and D. Pauly. Editors.
2019.FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 08/2019 ). IUCN. 2016. The IUCN Red List of
Threatened Species. Version 2016-3. Available at:
www.iucnredlist.org. FishBase team RMCA & Sparks,
J.S. 2016. Gogo ornatus . The IUCN
Red List of Threatened Species 2016: e.T55325247A58340529.