Proterorhinus blennioides

Common name. Caspian tubenose goby.

Diagnosis. Distinguished from other species of Proterorhinus in Caspian basin by: ○ eye diameter 16–21 % HL / ○ usually 13½ branched anal rays. Size up to 90 mm SL.

Distribution . Iranian Caspian basin.

Habitat. Usually associated with dense vegetation or coarse rocks.

Biology. No data

Conservation status. NE.

Remarks. In recent molecular literature, this species has been misidentified as P. semipellucidu s, a synonym of P. nasalis or a species potentially endemic to the Iranian Caspian basin.

Further reading. Stepien & Tumeo 2006 (genetics as P.semipellucidu s); Zarei et al. 2021 (phylogeny as P. semipellucidu s); Vasil’eva et al. 2025 (redescription).