Mayflies are an important food source for fish and other bug-eating wildlife. In most areas where Mayflies live, they are plentiful. They tend to reproduce near clean, unpolluted waters, so they may signal that fish from that stream is safe to eat.
•Naiads (Immature stage) have mouth part that allow the mayfly to chew while imagoes(adult) mayflies do not have mouth parts to chew from.
• Most mayfly larvae eat mostly dead or live algae...