https://sites.google.com/site/worldofserina/the-ultimocene-250-million-years/the-sea-shoggothI've got a few ideas about how these guys might work, for one thing, I think it would be cool if the idea of their hairs being important to their survival would be cool.
In addition to catching airbubbles for oxygen, I think they could have use long hairs in order to bind to each other more efficiently and to send electrical signals to one another quickly. I really like the idea of it being able to construct a rope using this hairy ant rope to latch onto creatures that might brush past or try to run away from it like a small whale.
Also, I think in addition to the millions of ants, they could also bind each other in a kind of proto gelatinous substance made from left overs from larger animals that can also be manuvered to create channels for quicker mobility throughout the shoggoth.