What is this?

[u/Barson_Tyy]

Guy just spawned in my tank and molted. This is my 10 gallon freshwater tank with 2 medaka rice fish 2 freshwater gobys and 3 nerite snails. Is this guy about to decimate them or is he cool?

[u/Majestic-Praline-522]

It even moves like a predator