The slender roughy, Optivus elongatus, is a fish of the family Trachichthyidae.

Until 2004 when two new species were described, the slender roughy was believed to be the only species in the genus Optivus.

Optivus elongatus (Slender roughy)

The most elongate species are typically the most active and frequent the shallowest depths; for example, the slender roughy (Optivus elongatus) is found in photic coastal waters and is associated with rocky reefs.

The most elongate species are typically the most active and frequent the shallowest depths; for example, the slender roughy (Optivus elongatus) is found in photic coastal waters and is associated with rocky reefs.