The fish was Hard! ... but I'm really enjoyed making it
well I know it was beyond your request, I guess I'm getting carried on
I hope your okay with this, here you go... Stingray!
I was planning to make another... but man... just making a single one is really tiring.
There's another fish, this one was from pixiv made by nick09. It was originally for RPG maker DS but I think the style itself is already fine with the VX sprite, I just rearrange it to match the VX sprite sheet. So here it is, Fish by nick09!
and also animating seaweed by Sen? in Here
I think that's it, I don't think I could find other underwater tileset, I already dig all the corner of the net but I didn't find anything worthy enough.
Underwater tiles is a lot more scarce than any other tiles...