Large gates are obstacles that block your path but they can be opened. This guide on How To Open Gates In Maneater as these huge gates can be found very early in the game, but the game doesn’t do a great job of explaining how you open them – which is something available towards the latter parts of the adventure.
These are very specific gates, there are only a few. These are not the gates that require Adult or Elder to break, those are opened simply by attacking them when you are a shark of appropriate age. These are the huge mechanical gates. When you first encounter one, the game explains that you can hit the switch to open the gate. However, that’s all the information it gives you. Once you’re an adult you can actually jump these gates pretty easy so they are relatively pointless, but here’s how to open them nonetheless.
How To Open Gates In Maneater
Firstly, you must be on the right side of the gate. The correct side shows a flashing button, you cannot see the button from the other side. From there, grab a large fish in your mouth. It has to be large enough to sustain a bite so you can hold it and carry it toward the gate. Once you are close enough to the gate hold the tail swipe button (L1 on PlayStation 4). You will see a reticle highlight the switch. Simply release the button and the shark will throw your catch directly into the switch. This opens the game permanently and can be used as a shortcut between areas later.
from GamersHeroes http://www.gamersheroes.com/game-guides/how-to-open-gates-in-maneater/