a large number of fish swimming together
a shoal of bream
(of fish) form shoals
these fish can safely be released to shoal with most adult species
an area of shallow water
we clawed our way out from the Bahamian shoals into the deep waters of the Atlantic
(of water) become shallower
the water shoals reasonably gently, and the swimming is safe
(of water) shallow
crabs will move to shoaler water when the current changes