Thanks so much!
Its a freshwater blenny (phenablennuius heyligeri). Its a little bigger than a cardinal tetra they love eating snails and are a bit territorial so I just keep two.
Thanks Rich, 1 is a furcata rainbow, 2 is a killiefish 3 dwarf chain loaches, 4 threadfin rainbows 5 dwarf neon rainbows the female above the male 6 the blenny and last a cardinal.