When it's time to take off, the hydrofoils retract and the sea glider won't fly within a wingspan of the water surface, benefiting from an aerodynamic principle called ground effect to glide along a cushion of air.
They're kept out of harm's way within these protective sheaths, but when he needs to use them, the Mega Lion would swing them into action, like switch-blade knives, and could slice up prey.
The cat lifts its head to find out what all the commotion is about, then concludes that all this is sensationally uninteresting and snuggles back into Parvaneh's lap. Or rather, her belly.