[2] The species epithet "frondiculus" is treated as an appositional noun, and is Latin for "a small leaf", referring to the shape of the orbital cirrus.

A. frondiculus is the only member of the genus which is not found in the western Indian Ocean or the Red Sea.

[2] The holotypic female A. frondiculus specimen measured 23.8 mm in standard length.

Its body was olive in colour, becoming white around the stomach, and also bore six brown stripes on either side.

While most species of Alloblennius possess short, minute supraorbital cirri, the cirrus is large and prominent on A.