Megamouth shark used as a means of identifying other individuals of megamouth sharks. Their mouths can reach up to wide. Megamouth sharks have up to 50 rows of teeth in their upper-jaw and up to 75 rows of teeth in their lower-jaw. In 1990, a 4.9-m (16-foot) male megamouth shark was caught near the surface off Dana Point, California. This individual was eventually released with a small radio tag attached to its soft body. The tag relayed depth and time information over a two-day period. During the day, the shark swam at a depth around , but as the sun set, it
Fish decoy then “swim” or "dangle" the decoy to attract a fish in close enough to spear. Another form of decoy that is sometimes used is called a “floater”. This type of fish decoy is not weighted, but is attached to a weight that holds the decoy at the desired depth. There are other fish decoys which have one or more hooks attached. In Minnesota, and some other states, these decoys are illegal and are referred to as "cheaters". In Michigan, a hooked decoy is legal and is simply counted as one of the number of lines that each angler is allowed