Can someone ID this odd fish?

[YaYgoldFish]

I saw it while looking around my lfs. The biggest one was about 4-5 inches..The guy that worked their said eh didn't know anything about these fish, maybe you guys can help me out. Here they are:

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[CAF]

Elephant nose Gnathonemus petersii

[YaYgoldFish]

Alright thanks.

[Kuli_Loach]

Yup, elephant nose, kinda like the black ghost knife.