Interesting Information and Facts - Why do most Koi Fish Species have gills?

Gills enable most Koi Fish Species to breathe. Gills consist of thin sheets of tissue containing blood vessels.

As water passes over the gills oxygen is absorbed into the blood stream Carbon dioxide passes out into the water. The gills are protected by a large bony plate called an operculum. Some species, however have lungs and breathe air.

- Angelfish will breed for life. If one of the pair dies, the other will not breed again!

- The box jellyfish is one of the most venomous creatures in the sea, the toxins from its venom attacks the nervous system, heart and skin!

- The teeth of a Piranaha are sharp enough to cut through a steel fishing hook

- Fish do not have vocal cords but they can make sounds! For example the Oyster toadfish uses its swim bladder to produce a wailing sound which is comparable to the sound made by a foghorn!

Facts about Fish Species
Did The colours, shapes and sizes of individual fishes varies enormously - you really need excellent quality pictures or photographs to assist in the identification process. A combination of the number of fins and their characteristics, color, scale counts, general features, maximum length and distribution are used during a species identification process. The species detailed on this website are Tropical, Saltwater, Aquarium , Marine , Pet , Pond, Clown, Koi, Beta (Betta), Gold Fish (Goldfish), Star, Angel, Puffer, Discus, Piranha, Rainbow, Parrot, Crustaceans, Sea Anemones and Coral..