Blind cave eels, Crazy Fish, Stonefish and more

[ghostknife]

I recently visited a shop which only sells FW fish it had on sale:

Blind cave eels

Butis Butis (Crazy fish)

Vietnamese blennies

stonefish (i think are allenbatrachus batrachus)

Please can you give me some info on keeoping these fish and are they suitable for any of my tanks. I espeicially like the stonefish!!