Yeah, it does look like Katsuyu! Really, the makers should just hire him or something! All of these ideas are well made.
WOW I love this mob...would rather it be a mount since I love the glaucus atlanticus and the fact that they are a major component in the creatures combined to create this mob. so beautiful and so creative...BRAVO SIR BRAVO!
If there are worlds that are mostly ocean then this would make for a cool underwater mount and I would definitely use it