Anomotodon sheppeyensis was a small lamniform shark belonging to the mitsukurinid branch of the shark family tree, the lineage that also contains the living goblin shark. Its fossils show that this distinctive group had a much broader Palaeogene history than the single surviving species might suggest.

The shark carried slender, pointed teeth suited to seizing small, mobile prey rather than crushing shells. Fishes and cephalopods are plausible prey, although its exact diet and hunting behaviour are not directly preserved.

A. sheppeyensis is known mainly from isolated teeth, so there is little direct evidence for its body form or preferred depth. It should therefore not automatically be given the deep-water lifestyle of the modern goblin shark; the fossils chiefly demonstrate a small predatory mitsukurinid living in the early Eocene sea.