Mene maculata (Bloch and Schneider 1801, de Lacepéde 1803, Paleocene to extant, 14cm) is the moonfish notable for its discoidal shape, highly compressed from side to side and long pelvic strands. The mouth is small and protrusible. Previously allied to perch, jacks, mahi-mahi and remoras, in the LRT Mene nests with the much longer, much larger giant oarfish, Regalecus.The skulls are nearly identical. Both arise from extan Gasterosteusand Cretaceous Plectocretacicus. This interrelationship has been previously overlooked due to taxon exclusion.

Cretatriacanthus guidottii (Sorbini 1996, Fig. 1; early Late Cretaceous; about 3cm) is traditionally known as the earliest known tetraodontiform, the clade that includes queen trigger fish, ocean sunfish and pufferfish. Here it nests with equally short moonfish like Mene and much longer oarfish, like Regalecus.

Regalecus glesne (Ascanius 1772; typically 3m in length, rarely to 11m) is the extant giant oarfish. Like the unrelated seahorse, the mouth is vertical, the dorsal fin provides the propulsion. The oarfish often swims vertically, sometimes at great depth. It feeds on plankton and small fish. The pelvic fins remind one of oars, but they do not contribute to propulsion. The oarfish is nearly all tail (caudal vertebrae). Distinct from seahorses, the snout is quite short.

Regalecus argenteus is overall similar with slightly different skull parts.