Every animal in the water is in motion: it wanders, it beats harder when it works harder, it faces where it is going and leans into its turns, and your lamp puts a wet highlight on it that moves as you circle. Nothing is a pin on a map any more — where an animal is drawn is where it actually is, so the net aims at the animal rather than at the spot it left ten seconds ago.
Each species keeps one temperament, the same on every dive. Some go about their business and barely register a drone. Some turn to face you, hold a standoff, and break if you close hard. Some flick between headings and make you lead the throw. Some swim a fixed round you can learn in one lap and then intercept. And some leave what they were doing and come to look at a drone that holds still — which is worth seeing once whatever else you catch that dive.
Two things that were true on paper are now true in the water. A creature that is actively bolting cannot be podded at all: its bright ring goes out the moment it breaks and the net refuses to aim until it settles, so you watch the shot leave the table instead of learning it by wasting a net. And Startle range — the stat a Hauler runs 35% louder on and a Scout 30% quieter — finally decides how far off you are read as a threat, which is the whole reason those two classes fly differently around the same fish. While the Scout's Phase Drift is up, nothing reads you at all.
Full breakdown, including all five temperaments and what each one asks of you, in the guide: The Ledger.