Ichthyological terms, not general ones.
A group of fishes, normally of the same species, that remain close to each other for some reason. Differs from a school in that individuals are not necessarily swimming together in the same direction. Also used to refer to a shallow area in a water body.
Used in 101 profiles
Short, normally shallow stretch of fast-flowing, turbulent water in a stream; a small rapid; a rocky shoal or sandbar causing such a rapid.
Used in 105 profiles
Tightly-aggregated group of fishes, normally of the same species, which tends to orient and move in the same direction; the act of schooling. Often confused with shoal.
Used in 135 profiles