These circular water spawns function similarly to schools of fish (Oily Blackmouth, Firefin Snapper, etc), although the actual wreckage objects can make the circular boundary of them hard to spot. Wreckage usually spawns at the same places regular fish schools are found. They may be 'fished' to salvage bits of wreckage. If the bobber lands within the circle, successful fishing will produce watertight chests, which contain a random selection of items, similar to land-based chest spawns. Also known as Floating Debris.