Gill
Videos
A gill is a specialized respiratory organ that many aquatic animals use for aquatic gas exchange, i.e. to extract dissolved oxygen from water and to excrete carbon dioxide. Branchia is the zoologists'
The red gills of this common carp are visibly exposed as a result of a gill flap birth defect.
Freshwater fish gills magnified 400 times
The red gills inside a detached tuna head (viewed from behind)
An alpine newt larva showing the external gills, which flare just behind the head
Fish
Videos
A fish is an aquatic, anamniotic, gill-bearing vertebrate animal with a tough cranium to protect the brain, but lacking limbs with digits. Fish can be grouped into the more basal jawless fish and the
Gill
…found in various groups of aquatic animals, including molluscs, crustaceans, xiphosurans, aquatic insects, polychaetes and most aquatic vertebrates (fish and amphibian tadpoles). Semi-terrestrial marine animals such as crabs and mudskippers have gill chambers in which they store water, enabling them to…
Balantiocheilos melanopterus Karlsruhe Zoo 02
Dunkleosteus was a giant Devonian armoured placoderm, c. 400 mya.
Largest: whale shark
Smallest: e.g. Paedocypris progenetica