Market the hell out of them!
Seriously, they are begging to have an entire line of food products made from them. Imagine the market for such paltry dishes like Mana-meat, Mana-milk, and my personal favorite, Mana-cheese.
It all worked out for the cows, and hell, these are sea-cows! It can't fail. And besides, let's all face it, if it weren't for cows being so damn tasty, they'd probably be on an even worse footing than bison due to their having not anywhere near the girth or smarts of their gigantic cousins.
On a side note, the main point of this whole thing is to get Novatore's hackles up, but hopefully it brought some lails along with it,