The lighting and proportions are generally consistant and well done
Throughout the drawing however the proportions on the arms look off
along with some of their shading, making them look a bit flat.
This is mainly an issue with forshortening. I have a hard time
forshortening as well, maybe a helpful excercise could be holding up
a toilet paper roll and observe it at different angles as it comes
towards you. The blue part on her stomach looks confusing and out
of place with the rest of the drawing. I'm not sure if it's meant to be
a painting on her abdomen or her skin sort of ripped to show water
Inside it but it doesn't translate clearly and kind of wrecks the cohesiveness
the piece would otherwise have. The fish is well drawn despite that though.