Fish (Wiki)
http://en.wikipedia.org/wiki/Fish
Diversity of fish (Wiki)
http://en.wikipedia.org/wiki/Diversity_of_fish
Basic taxonomy of fishes
Jawless fish
"
Jawless fish
are the most primitive fish. ... Extant jawless fish are either
lamprey
or hagfish."
Cartilaginous fish
"
Cartilaginous fish
have a cartilaginous
skeleton. ...There are over 980 species of cartilaginous fish. They include
sharks, rays
and
chimaera."
Bony fish
"Bony fish include the lobe finned fish and the ray finned fish.
The lobe finned fish is the class of fleshy finned fishes, consisting of lungfish, and coelacanths. They are bony fish with fleshy, lobed paired fins, which are joined to the body by a single bone.[11] These fins evolved into the legs of the first tetrapod land vertebrates, amphibians."
"Ray finned fishes are so-called because they possess lepidotrichia or "fin rays", their fins being webs of skin supported by bony or horny spines ("rays").
There are three types of ray finned fishes: the chondrosteans, holosteans, and teleosts."
"Teleosts are the most advanced or "modern" fishes. They are overwhelmingly the dominant class of fishes (or for that matter, vertebrates) with nearly 30,000 species, covering about 96 percent of all extant fish species."
Parrotfish (Wiki)
http://en.wikipedia.org/wiki/Parrotfish
Trout (Wiki)
http://en.wikipedia.org/wiki/Trout
Brooding behavior
"Fish adopt a variety of strategies for nurturing their brood. Sharks, for example, variously follow three protocols with their brood. Most sharks, including lamniformes[63] are ovoviviparous,
bearing their young after they nourish themselves after hatching and
before birth, by consuming the remnants of the yolk and other available
nutrients. Some such as hammerheads[64] are viviparous, bearing their young after nourishing hatchlings internally, analgously to mammalian gestation. Finally catsharks[65] and others are, oviparous, laying their eggs to hatch in the water.
Some animals, predominantly fish such as cardinalfish[66] practice mouthbrooding,
caring for their offspring by holding them in the mouth of a parent for
extended periods of time. Mouthbrooding has evolved independently in
several different families of fish.
Others, such as seahorse[67] males, practice pouch-brooding, analogous to Australia's kangaroos, nourishing their offspring in a pouch in which the female lays them."
2001
The Mauthner cell and other identified neurons of the brainstem escape network of fish.
2002
Evidence for a widespread brain stem escape network in larval zebrafish. - Free full text -
http://www.ncbi.nlm.nih.gov/pubmed/11784774
2014
Neural control and modulation of swimming speed in the larval zebrafish.
Free PMC Full Text
My comment:
Only one mention of GABA, and it was phasic rather than tonic.
CotA Fish
150806 - 1122