Fishes · Bony fishes · Combtooth blenny

Aden Blenny

Antennablennius adenensis Fraser-Brunner, 1951
5 cm1-2 mLeast Concern
818

This fish lives in the last two meters of water before the shore, which is most of the reason nobody has seen it. Divers pass through that layer on the way to somewhere else, and it is the worst place on a reef to be holding a camera: surge, backwash, and rock a meter from the port.

Blennies do well there. This one has no swim bladder, like the rest of its family, so it is not fighting to stay down. It sits on the rock propped on its pelvic fins, lets the water wash over it, ducks into a hole when the surge comes through and is back out immediately afterwards.

The tentacles above the eyes are what the genus is named for, and most of the family carries some version of them: branched flaps over the eye, sometimes on the nape as well. They are not dramatic sensors. They break up the outline of a head sitting in a tuft of algae, which for a five-centimeter fish in bright shallow water is worth a great deal.

The eggs go into a crevice, stuck down on a pad of filaments, and the male stays with them until they hatch.

The genus. Antennablennius Fowler 1931 - antenna (tentacle). ETYFish

How to recognise it
  • small gray fish crossed by about eight purplish bars
  • rows of bright dots across the cheeks
  • a pair of branched tentacles above the eyes
  • in the top two meters over rock, in the surge
  • up to 5 cm

Why it's threatened

Residential & commercial development
Housing & urban areas · Tourism & recreation areas
Human intrusions & disturbance
Recreational activities
Pollution
Thermal pollution

Substantial sea bottom dredging, resulting in changes of water flow and sedimentation rates, for industrial, infrastructure-based, and residential and tourism development along the coast have caused deterioration in most benthic habitats (Sheppard et al. 2010). For example, large number of desalination plants on the coast of the Persian Gulf leads to localized increases in temperature and salinity (Q. Alghawzi, D. Feary, and S. Hartmann pers. comm. 2014). It is not known whether or not this species is directly affected by this coastal development, but due to the large-scale of coastal development throughout the Persian Gulf and given this species' habitat preferences, it is likely to be impacted negatively in some parts of the region.

Threat classification from the IUCN Red List.

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Last Update: August 17, 2026