Here is an adolescent amhpiovek, a species i made a while ago and tbh have still...never quite figured out, heres one of my many attempts to try design them.
This is a younger female amhpibovek. The younger ones will usually have tadpole like tails still on and weaker lungs.

Female ones can have an accenting colour, but their colours arent as vibrant or spread out as their male counterparts. However, female amhpiboveks are a little larger.

This was supposed to be a rough doodle but I got a little carried away with the colouring (albiet i never cleaned up the lines lmao) sooo uhhh make of it as u will