Fish Feeders

Many groups of freshwater fish extract oxygen from the breath as well as from the drench using a assortment of discrepant structures. Lungfish have paired lungs identical to those of tetrapods, gouramis have a construction called the labyrinth organ that performs a similar function, while numberless catfish, such as Corydoras extract oxygen via the intestine or stomach. Form shape and the arrangement of the fins is highly variable, covering such seemingly un-fishlike forms as seahorses, pufferfish, anglerfish, and gulpers.

Fish Feeders

Most fish alteration by contracting paired sets of muscles on either indirect of the backbone alternately
These contractions form S-shaped curves that proceeding down the body of the fish
As each festoon reaches the astern fin, backward impulse is created
This backward force, in conjunction with the fins, moves the fish forward
The fish's fins are pre-owned like an airplane's stabilizers.