These fish can be found on the Halo 3 level Sierra 117, at the chapter Charlie Foxtrot, where the Pelicans are attacked by Covenant Loyalist Banshees. You can also see them on your radar at the main dam (Rally Point Bravo). If a player jumps in the water, that person may walk around and see them. They will appear as small yellow dots on your radar screen, similar to allies but smaller. They are obviously different from the type of fish seen at High Ground, as they are much larger, differently colored, and lack the odd snout that the High Ground species have.