Sawfish
Sawfish are mostly found in relatively shallow waters, typically at depths less than , and occasionally less than . Young prefer very shallow places and are often found in water only deep. Sawfish can occur offshore, but are rare deeper than . An unidentified sawfish (either a largetooth or smalltooth sawfish) was captured off Central America at a depth in excess of .
Satinfin shiner
It is a freshwater fish that inhabits rivers and creeks, sometimes entering pools and riffles, and found from headwaters to areas near tidal influence. It eats insects, especially flies and mayflies. Spawning occurs in spring and summer, with individuals spawning several times over a season. The eggs are laid in cracks and crevices, under rocks, and on tree roots and wood debris. The male guards them until the young emerge in about one to two weeks, depending on temperature. The lifespan of the species is 3 to 4 years.