Protoelongata corallina, common name the coral mitre, is a species of sea snail, a marine gastropod mollusk, in the family Costellariidae, the ribbed miters.

[1][2] (Original description) The shell is somewhat fusiform, polished and a little recurved at the base.

The whorls are transversely obsoletely striated and longitudinally plicately ribbed.

Its colour is amber or coral red, the ribs whitish.

[3] This marine species occurs off the Philippines.