Coriocella nigra is a species of sea snail, a marine gastropod mollusk in the family Velutinidae.

An Indo-Pacific species, it lives on rocks at depths of up to 15 m. It is up to 10 cm long and has an internal shell; body color is black or brown.

[5] Nowadays, at least six other species are recognized in the genus Coriocella and Blainville's binomial name is still treated as valid and in use.

[6] The distribution of Coriocella nigra is Indo-Pacific[7] and includes South Africa,[8] Mozambique, Kenya,[9] Madagascar, Mauritius,[4] Réunion,[10] Mayotte, Gulf of Aden,[4] Gulf of Elat,[11] South Button Island,[12] Myanmar, Thailand, Indonesia,[9] Papua New Guinea,[13] northern Australia and eastern Australia,[14][15] Philippines,[16] Palau,[9] Society Islands in French Polynesia,[17] New Caledonia,[18] Japan,[19] and Hawaii.

[16] The borders of the mantle are delicate, notched in front and spreading out widely.

[4][16] There is an inhalant siphon extended in the middle of the front part of the body.

[4] C. nigra has an internal and reduced shell, and spirally rolled radula, as have all the members of the family Velutinidae.

[4] The ostracod Pontocypria coriocellae lives as an occasional commensal in the oral tube of C.