Aden Blenny
Aden Blenny
Aden Blenny
Aden Blenny
© Brian Mayes
Fishes · Bony fishes · Combtooth blenny

Aden Blenny

Antennablennius adenensis Fraser-Brunner, 1951
5 cm1-2 mLeast Concern
800

Antennablennius adenensis, commonly known as the Aden blenny, is a small, tropical marine fish native to the undefined, ranging from the 🌊 Red Sea to the 🌊 Persian Gulf and the coastal waters of 🇵🇰 Pakistan. This fish is typically found at shallow depths of 1 to 2 meters (approximately 3 to 6 feet) in marine environments.

The Aden blenny reaches a maximum length of about 5 centimeters (roughly 2 inches). It has a distinct gray coloration with eight purplish bars running along its body. Its cheeks are adorned with rows of bright dots. The dorsal fin of the Aden blenny is composed of 12 spines and between 17 to 19 soft rays, while the anal fin consists of 3 spines and 18 to 20 soft rays.

These fish are commonly associated with rocky bottoms. They reproduce through an oviparous process, meaning they lay eggs. The eggs are demersal, meaning they settle to the bottom, and they adhere to the substrate using a filamentous, adhesive pad or pedestal. After hatching, the larvae are planktonic and often inhabit shallow coastal waters.

The scientific name Antennablennius comes from the Latin word for sensory organ, referencing the small, horn-like appendages some fish have, combined with the Greek word for mucus, which is a characteristic of the skin of blennies.

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: June 28, 2026