There are many members of this family (Hemiptera:Belostomatidae aka "toe biters & alligator ticks") of aquatic insects all of which can and do often deliver painful bites. They are often found in children's dip nets and are confused with the benign water beetle. Very interesting is that the males of this family rear their young on their backs.
Caddisfly, common name for certain aquatic insects that resemble small moths. The wings of caddisflies are covered with small hairs, distinguishing them from the scaled wings typical of moths. About 4500 species exist worldwide;