One common fishnet-hunting false fish is the armfish. The fifth and lowest skull of these odd-looking animals is set back a ways (in most species about halfway down the body, some less, some more) and modified into a long, complex, grasping appendage. Sometimes the fourth skull is also used for grasping and coordinates with the fifth. Armfish will also capture mace snakes, not good for food, but a menace that no community wants around.
The ways that animals use to avoid becoming food at times seems endless. One type of fish is nearly symmetrical and capable of swimming backwards or forwards, keeping predators guessing which direction it will move next. It has a fin across its face that splits when the mouth opens.
Two types of fish are shaped like teardrops and school together, but one has a narrow mouth and the other a narrow tail, making them opposites and confusing predators which way they are facing.
Another group of fish have between two and five tails, depending on species. By using only one of the outer tails to swim and having different coloration on this part of the body, predators can be tricked into thinking that this part is the entire fish. When they reach for it, the fish can suddenly turn on its center of mass to move in unexpected ways. Alternately, the fish can make use of chromatophores to switch the colored part of its body to the other end, making it look as though the fish has mysteriously teleported, confusing predators to the point that they give up and hunt something less weird. The multitude of tails can also be used to grasp seaweed strands while resting.
The snaptail (seen above) has a large tail that looks like a gaping, toothy, mouth. It even has a false eye to complete the illusion. Unlike with Earth butterfly fish, this tail can actually snap shut on pursuers and draw blood.
A member of a larger group of false fish with distinct necks and heads containing a single mouth leading to anywhere from two to six throats, the racing goblin has a mouth full of terrifying teeth leading to only two throats. Like others of the group, the racing goblin lacks scales and instead has root-like growths spread under the skin. Three meters long and slender with large pectoral fins, the racing goblin is fast enough even to catch quickipedes and bite them in half. Nothing in the weedy seas is fast enough to catch up with it. Only ambush predators have a chance.