Seriola zonata
Size
to 24"
Habitat
Coastal surface waters, congregating around any floating objects
Description
Juveniles ( shown, up to 12" ) are attractively patterned with six or seven dark bars; these are lost in adults, which are also much slimmer. Schools of small Rudderfish can often be found around boats, and even around divers hanging on the anchor line. Pilotfish are similar, but larger and retain dark bars throughout life.
The main purpose of a filter is to circulate the water. This leads to better aeration and higher oxygen levels for both the fish and the critical bacteria which decompose the fish wastes. The more obvious aesthetic effect of filtration is the mechanical removal of particles in the water, but this is of much less importance. Since most aquaria are stocked far more heavily than natural conditions, constant effective filtration and circulation are essential. On large tanks ( 55 gallons or more ), consider using two smaller filters in place of one large one, and place them at opposite ends of the tank for maximum circulatory effect.
More: Aquarium Guide - Filtration ...
