When the transformation animation plays, it makes the player turn red like they are taking damage, taking away from immersion, and bringing to mind Minecraft's questionable animation choices. I assume this is because of the health increase, so simply making the player's health increase all at once before the transformation could fix this issue.
Then making the player struggle or bend over rather than just bringing their hands to their face could also improve immersion. The current animation just feels a little stiff to me.
However, as a mod author/coder I understand that adding/fixing stuff isn't as easy as sitting down and clacking on the keyboard for a minute or two like a lot of people think. So, if you can't, or just don't want to add/fix these things, I totally understand.

EDIT: I found another bug. On the latex transformations with no legs, your legs just disappear before the tail comes down. Making the legs fold into the body and then disappearing AFTER the tail comes down could fix this. Currently, you are hovering during the first part of the transformation.

SECOND EDIT: Apparently this only happens on the siren. On the snake and the female manta ray your torso shrinks and starts floating, and the mermaid shark looks fine.

THIRD EDIT: Some other buggy animations:
-Latex Human
-Dark Dragon
-Translucent Lizard
-Buff Female Latex Shark
-Green Lizard
-Latex Alien
-Partial Latex Human

Thanks for the help! I appreciate your quick response and fix for something that could take a lot of work, especially when you have a lot of other stuff going on with this mod!
One last question, when is this update going to be released? This week, this month, next month?

Sweet! Thanks for fixing the first issue. Do you have plans to fix the second issue soon or is it on more of the long-term to-do list?