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Scientific Name: Canthidermis maculata Bloch, 1786
English Name: Rough triggerfish
Local/Bangla Name: Pistol mach (পিস্তল মাছ)
Rough triggerfish - Pistol mach (পিস্তল মাছ) - Canthidermis maculata - Type: Bonyfish

Photo: ABR Lab

Classification:
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Tetraodontiformes
Family: Balistidae
Description:
The body is oblong, elongated (depth 36-45% of SL in adults), robust, and compressed. Cheeks lack longitudinal grooves, but there’s a distinct groove before the eye and below the nostril. The small mouth opens at the front with powerful jaws, featuring 8 heavy, unevenly notched teeth on the upper and lower jaws. The gill opening is a short slit on the side before the pectoral base. The dorsal fin has III spines and 23-25 rays, while the anal fin has 20-22 rays. Pectoral rays number 13-15. The soft dorsal and anal fins are long and curved, with anterior rays much longer than posterior rays. The dorsal, anal, and pectoral fins have mostly branched rays. The tail base is compressed without spines, tubercles, or ridges, and the caudal fin is double concave, rounded in juveniles. Pelvic fins are externally reduced to 4 pairs of large scales encasing the end of the pelvis. The skin is thick, leathery, very rough, with regularly arranged diagonal scale plates. The snout lacks scales, and there’s no patch of enlarged scales behind the gill opening. The coloration is blue-grey to nearly black, often covered with small white spots. It grows to a size of 50 cm.
Habitat & Distribution in Bangladesh:
Coral reef ecosystem of Saint Martin’s Island, Bangladesh
Environment:
Marine (Reef associated fish)
Other References:

Uddin MS, Chowdhury SR, Rashed MR, Singha NK, Tazim MF, Mamun MAA, Mamun A, Rahman MM, Hasan ME (eds.) (2022) Album: Marine and Coastal Fishes of Bangladesh, Department of Fisheries, Government of Bangladesh. 336 pp

Hossain MS, Chowdhury SR, Sharifuzzaman SM , Islam MM, Hasan J, Haque MA , Ali MZ, Hoq ME, Mahmud Y. Marine Fishes of Bangladesh (2020) Bangladesh Fisheries Research Institute and Institute of Marine Sciences, University of Chattogram, 512pp.

DNA Barcodes from Bangladesh
GenBank Accession Number:
Other DNA Barcodes & Nucleutide Sequences
IUCN conservation status:
Other Information