Amazing!

Has a really nice feeling of twilight to it and especially the moving away part of the animation is super cool.

Very cool animation!

Wow, this is some incredibly detailed and smooth animation!

Pretty creepy! Really nice animation :D

it looks flexible

So fun fact, electric eels are knifefish! :D 
I really love this piece, I'd love to see more animal animations in your style!

Those knifefish look very neat! This one is based on a electric eel :p

Fantastic Weerd! Reminds me of a knifefish! :)

omg this is so cool, I wish I could change my vote. I would totally vote for you.

Moving water at the surface, better (timed) static effects, background swimming scene (instead of fade-in) lots of polish among other things. Ow well...it is what it is ;p

Rushed or not, I think it turned out great. What did you have to "cut", additional effects, or just more polish?

great job, the animation is very...fluid :)