Biology- 4th Period
A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with-digits.
Fish live in water.
Fish have a backbone. They are vertebrates.
Fish breathe using gills. They absorb oxygen through the gills.
Almost all fish are cold-blooded.
Some fish have scales.
-Unlike mammals, fish are cold-blooded. This means that they do not maintain a constant internal body temperature; instead, their temperature is greatly influenced by their environment.
-A fish’s fins are used for balance and to help propel and steer through the water.
-Most fish have scales. These overlap in rows and help protect the fish against injuries and infection
-In order to breathe underwater, fish have developed special organs called gills.
-Fish have a unique internal organ known as the swim bladder or air bladder, it helps fish move up or down in the water
-Many fish have excellent vision and can see colors.
-Lepidosireniformes -Coelacanthiformes -Polypteriformes -Acipenseriformes
-Lepisosteiformes -Amiiformes -Hiodontiformes -Osteoglossiformes
-Elopiformes -Albuliformes -Notacanthiformes -Anguilliformes
-Culpeiformes -Gonorhynchiformes -Cypriniformes -Characiformes
-Siluriformes -Argentiniformes -Salmoniformes -Esociformes
-Ateleopodiformes -Stomiiforms -Aulopiforms -Myctophiformes
-Lampridiformes -Polymixiiformes -Percopsiformes -Gadiformes
-Ophidiiformes -Batrachoidiformes -Lophiiformes -Gobiesociformes
-Cyprinodontiformes -Beloniformes -Atheriniformes -Stephanoberyciformes
-Beryciformes -Zeiformes -Gasterosteiformes -Synbranchiformes
-Scorpaeniformes -Perciformes -Pleuronectiformes -Tetraodontiformes
Beryciformes: -No external ears -No eye lids.
-Skeleton made of bone -Lateral line
-Two chambered heart. Operculum covering the gills. Brain with large optic lobes and cerebellum.
-Skin with mucus gland. Paired fins made of rays and spines, or lobed fins lacking the rays and spines.
-Various types of scales. -Marine and fresh water species.
-Gills used for respiration -External fertilization. Spawning. Oviparous.
Abundant around coral reefs in warm seas. Characterized by relatively large head, with supra-occipital crest, well-developed serrate spines on the pre-opercle, opercle, and rostrum. Length of spines diminish and head armor forms with development to pre-juvenile stage. Initially Cuvier and Valenciennes identified specimens collected from Indian Ocean.
Rough scales, prominent fin spines, a large eye, and usually a red coloration. They possess a moderately large mouth, but they are small, obsess a sharp venomous spine at the lower corner of each cheek, and can inflict a painful wound if handled carelessly.