The USS Triton (NCC-80106) was a Federation starship that was in service to Starfleet in the early 25th century.
In 2401, the Triton participated in Frontier Day celebrations near Sol Station. Along with the rest of the fleet, it was seized by the Borg Collective after its younger crew were assimilated by a Borg signal transmitted via Jack Crusher. (PIC: "Vox")
This starship was only mentioned in writing.
This ship was presumably named for Neptune's moon Triton.
This ship was identified by Dave Blass as a Luna-class. [1]