 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
Snuffbox mussel (Epioblasma triquetra). These
little mussels and others in the genus Epioblasma trap host fish
by clamping the shell shut on the fish's head. The primary host of
snuffbox is logperch, a widespread darter that turns stones to find food
and is therefore likely to stick its nose into a trap. The sharp points
on the edges of the shell help to prevent the fish from escaping until the
mussel has placed glochidia on its gills.