Hoplisoma griseum

Hoplisoma griseum, the gray corydoras, is a species of freshwater ray-finned fish belonging to the subfamily Corydoradinae, the corys, of the family Callichthyidae, the armoured catfishes.^[2] This catfish is only known from the Kuribrong River, a tributary of the Potaro River, in the Essequibo River basin, in the Potaro-Siparuni region of Guyana.^[1]

Hoplisoma griseum is oviparous. The female holds a batch of between 2 and 4 eggs between her pelvic fins, and the male takes around 30 seconds to fertilise each batch. The female then swims to a suitable spot, where she attaches the very sticky eggs. They repeat this process until around 100 eggs have been fertilised and stuck to a substrate.

This species has a maximum standard length of 4.2 cm (1.7 in).^[3] This species is a benthic feeder, preying on small invertebrates that live on the bottom.^[1] The gray corydoras is a facultative air breather.^[3]

Hoplisoma griseum is threatened by encroachment on its habitat by gold mining activities which use jets of water to wash away the river banks, as well as dredging the riverbed.^[1]