Salvelinus neocomensis is an extinct deepwater trout species only known from three specimens fished in Lake Neuchâtel (Neuenburgersee) in 1896, 1902 and 1904.

[2] This rare endemic trout lived in the great depths of the lake, below 80 m (260 ft).

It only reached about 15 cm (5.9 in) in length.

It had fins without white margins and yellowish flanks,[3] which earned it the local name Jaunet.

[citation needed] Research undertaken in the 1950s and 2003 failed to find evidence of the survival of this species after the last reported specimen.