These purple-colored fish are among the smallest of metal heads. They have two little fins and a variety of spikes of various sizes all over its body ending with a thin tail.
Needle fish will lazily swim around in shallow waters waiting for an enemy to enter it. If they detect an enemy they will swim towards it and self-detonate, sending a barrage of spikes towards it's target.
The needle fish's main advantage is it's hard to see body. It will aimlessly swim around in the water until an enemy draws near, after which it will chase it and attempt to make contact. If it does so it explodes and sends forth a blast of needles. As such the way to defeating the needle fish is to usually not defeat it and just avoid it altogether, preferably using the jet board. If need be however, any long range weapon will do, as long as you do not get close to it when it explodes.