Siyok - Colours and Markings

When looking to colour Siyok I looked at a variety of sources; Fish, Snakes, Frogs, Amphibians and Whales were referenced.

Out of the options I feel that 2 and 6  look the best for Siyok, I feel that these are more in keeping with the bottom feeder look I keep banging on about. Others such as 1, 5, 4, 7 and 8 look like hey might be better suited to protagonists in the story where as 3 looks like an ice lolly.... though I quite like his eyes.
The darker, more natural colours look more believable and ground the character though i feel that 6 would be more suitable as it looks more like an amphibious animal like a Salamander where as 2 looks a bit too reptilian.