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Sediment

Particles of organic or inorganic origin that accumulate in loose form

Semelparous

The reproductive strategy of an organism characterized by a single reproductive event before death

Site fidelity

The tendency of an animal to return to a previously occupied location

Sneaker Male

A male fish that disguises itself in appearance as a female (in size or coloration) to sneak into other males nests to fertilize eggs

Spawning aggregation

A grouping of a single species of fish that has gathered together in greater densities than normal with the specific purpose of reproduction

Swim bladder

A gas-containing, flexible, cigar shaped organ that aids many fishes in attaining neutral buoyancy