So, there is a tail mod for the Hylotl like there is for Avians, Apex and Floran. Can't say I like it much, because Hylotl are not fish - they are amphibian-like, and they are based off of these salamanders (the Axolotl): I want Hylotls with a tail, but I don't want a fish tail... Perhaps someone could take up the challenge of making a new tail mod for the Hylotl with an Axolotl-style tail? Because of PNG compatibility issues, I'd be happy to help with compatibility edits - I just can't sprite well.
I just started one, but it's super rough at the moment. About double the size of the newt tail. If I get bored of it, I will pass on the graphics wherever they are at. A related question though: what are the colour values that are automatically recolourable? My armour pieces thus far have been rather static since I don't know this. One would definitely want the fins to match the individual's flesh & fin colours.
Just use the same colors as the base hylotl sprites. These values can be found in json but it's not necessary to change them.
Here's the quick & dirty version. Haven't done the animation tests to see if it's fluid, but hopefully it's enough to get you started.
I can't test it. Not at my computer. You can, though, with a quick overlay of the vanilla hylotl spritesheet and a quick mod ala ATF.
Here is my latest version. Mackinz this one is a few frames updated on the running animation and a fin-ray effect, which may be aesthetically divisive. Anyone can use this, just copy it to any "back.png" of what you're wearing often. CC3.0 BY-SA
Now if you could make it apply to the base character images like Avian Tail Feathers does for Avians, that would be great. Climbing sprite included.