Oceanida is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.

These are subtidal snails that are parasitic on echinoderms.

(Originally described in Latin as Spiroclimax) The shell exhibits a subcylindrical form, characterized by transparency and a suture that resembles a gently descending spiral staircase.

The outer lip is thickened, featuring a sigmoidally margined profile that curves inward towards the suture.

The columella is moderately thick, adorned with a funicular cord and exhibiting minimal plication.