To minimize energy expended on pursuit, they've emphasized stealth in their movements through the water: no splashes, no large ripples give them away.
Let's start with trim adjustment, demonstrated by this amazing little guy:
See, crocodilians can move their lungs around in their body. 🫁🔃
Alt: I'm bad at species ID, but this looks like it could be a small crocodile in a zoo setting. We're seeing above and below the waterline thanks to a glass-sided tank. The head looks normal, but the body slowly shifts from horizontal to vertical in a way that I find comical, like its whole body shifts posture without making any effort.
