Rhombichthys intoccabilis is an extinct clupeomorph described from the town of Ein Yabrud, in the West Bank.

It lived during the Cenomanian age of the Late Cretaceous epoch.

[1] The adults of R. intoccabilis had a very deep, scute-covered belly.

In conjunction with the high, triangular dorsal fin, the belly gives the fish a rhombus-shaped body profile, hence the generic name.

The juveniles, in contrast, had a far shallower belly, having a rounded profile.