The one thing I have to say about the Mobula is that it is odd in the sense that it doesn't look like a normal airship structure. Perhaps this is due to the lack of overhanging balloon, but it feels like the odd one out, with Squid as a distant cousin. Also on the subject, what is it with Muse and marine animals?
Goldfish
Squid
Manta Ray
Qwerty
Sky Whale
Harpoon (kinda)
Hmm, with all this marine madness, I bet we'll see the Electric Eel. It'll be long but very thin, and it will be premiered with the return of the God Lamp and added weather effects, such as lightning. The trick will be where you can unload your boarding party, and fighting in the cramped deck. Take that, meta.