Yay, some lovely creatures, always appreciated! I love your concepts and ideas, very nightmare fuel. One thing: Don't be afraid of clean edges. Consider cleaning up your lines, because as of now everything looks pretty "muddy". I know you are drawing organic things, but stuff like scales or just in general materials don't read well, which takes away from your lovely concept, because I get what you are going for, but with some nice texture work this would read so much better. I would recommend you doing some texture studies of animals, sea animals in particular as you seem to like to go into the depths with your characters. Lovely works and keep going, I enjoy them a lot!