The dorsal fin keeps the perch's body from rolling from side to side and assists the fish in making sudden turns and stops. It plays no role in propulsion.
Except for the tail fin, perch fins have no connection to the skeleton and are held in place by muscles. The tail fin helps propel the fish and provides up to 40 percent of the fish's forward thrust. The remaining thrust is generated by the muscular body as it flexes from side to side. Perch angle the paired fins on their bodies to swim upward or downward and also use these fins to slow down and stop.Learn More
There are no differences between the two, because fluke is one of the common names of the summer flounder. Other names for this fish include common flounder, flatfish, turbot and chicken halibut.Full Answer >
Cichlids eat crickets, shrimp, small frogs, fish eggs and worms. They also eat plant material and other fish. Cichlids kept in captivity also benefit from the added nutrients found in commercial cichlid fish-food pellets. It is best to use sinking pellets when feeding captive cichlids.Full Answer >
The rhino pleco, also known as a chocolate pleco or alligator pleco, is a species of suckerfish with two horn-like protrusions on the end of its snout. These protrusions are actually extended nasal channels.Full Answer >
Ember tetras are small, brightly colored tetra that grow to about 1 inch long. The species is native to Brazil, inhabiting quiet tributaries, backwaters and oxbow lakes. Ember tetras swim among vegetation and are vulnerable to other fish due to their small size.Full Answer >