Zebra bullhead shark

Scientific classification

Kingdom: AnimaliaPhylum: Chordata Class: ChondrichthyesSubclass: ElasmobranchiiOrder: Heterodontiformes Family: Heterodontidae Genus: Heterodontus Species: H. zebra

The Zebra Bullhead Shark (Heterodontus zebra) is a bullhead shark of the family Heterodontidae, found in the subtropical western Pacific Ocean between latitudes 40° N to 20° S, at depths of between 50 and 200 m. Its length is up to 1.25 m. Reproduction is oviparous.

Pacific staghorn sculpin

Scientific classification

Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Scorpaeniformes Family: Cottidae Genus: Leptocottus Species: L. armatus

The Pacific staghorn sculpin, Leptocottus armatus, is a common sculpin (Cottidae) found in shallow coastal waters along the Pacific coast from Alaska to Baja California. The sole member of its genus, it is unusual for having spined antler-like projections on its gill covers; it can raise the projections as a defense mechanism.

Staghorn sculpins are slender fish, with a grayish olive above, pale creamy yellow sides, and a white belly. The first dorsal fin has 7 spines and usually a dark spot in the posterior half, while the second dorsal has 17 rays. The anal fin also has 17 rays, while the pelvic fins have four rays. The fins have barred patterns of varying prominence. They can reach a length of 46 cm.

They are common in estuaries and coastal lagoons, where they feed on a variety of invertebrates, primarily amphipods such as Corophium.

Walleye

Scientific classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Perciformes Family: Percidae Genus: Sander Species: S. vitreus

Walleye (Sander vitreus, formerly Stizostedion vitreum) is a freshwater perciform fish native to most of Canada and to the northern United States. It is a North American close relative of the European pikeperch. The walleye is sometimes also called the yellow walleye to distinguish it from the blue walleye, which is an endangered subspecies found in the Great Lakes.

In some parts of its range, the walleye is known as the colored pike, yellow pike or pickerel (esp. in English-speaking Canada), although the fish is related neither to the northern pike nor to the other pickerels, both of which are members of the family Esocidae. Their closest genetic relative is the sauger and often times breeding occurs between the walleye and sauger producing an offspring known as saugeye.

Genetically, walleyes show a fair amount of variation across watersheds. In general, fish within a watershed are quite similar and are genetically distinct from those of nearby watersheds. The species has been artificially propagated for over a century and has been planted on top of existing populations or introduced into waters naturally devoid of the species, sometimes reducing the overall genetic distinctiveness of populations.

Holocentridae

Scientific classification

Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Beryciformes Family: Holocentridae

The Holocentridae is a family of ray-finned fish, belonging to the order Beryciformes with the members of the subfamily Holocentrinae typically known as squirrelfish, while the members of Myripristinae typically are known as soldierfish. In Hawaii they are known as menpachi.

They are found in tropical parts of the Indian, Pacific and Atlantic Oceans, with the greatest species diversity near reefs in the Indo-Pacific. Most are found at depths from the shoreline to 100 m (330 ft), but some, notably the members of the genus Ostichthys, are generally found far deeper. Being largely or entirely nocturnal, they have relatively large eyes. During the day they typically remain hidden in crevices, caves, or under ledges.[1] Red and silvery colours dominate. The preopercle spines (near the gill-opening) of the members of the subfamily Holocentrinae are venomous, and can give painful wounds. Most have a maximum length of 15-35 cm (6-14 in), but Sargocentron iota barely reaches 8 cm (3 in), and S. spiniferum and Holocentrus adscensionis can reach more than 50 cm (20 in). The squirrelfishes mainly feed on small fishes and benthic invertebrates,[1] while the soldierfishes typically feed on zooplankton. The larvae are pelagic, unlike the adults, and can be found far out to sea.

Rhinichthys

Scientific classification

Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Cypriniformes Family: Cyprinidae Subfamily: Leuciscinae Genus: RhinichthysAgassiz, 1849

Rhinichthys, the riffle daces, is a genus of freshwater fish in the carp family (Cyprinidae) of the order Cypriniformes. The type species is Rhinichthys atratulus, the blacknose dace. Rhinichthys species range throughout North America.

The genus contains eight living species, one of which (the loach minnow) is considered Vulnerable. It also includes the extinct Las Vegas dace, which was only first described in 1984 and had disappeared by 1986. The cheat minnow (Pararhinichthys bowersi), a natural hybrid of the longnose dace (R. cataractae) and the river chub (Nocomis micropogon), was formerly placed in this genus, but is now valid under Pararhinichthys.

The riffle daces are a basal lineage in an insufficiently resolved clade of American Leuciscinae. Such a group had been proposed on anatomical evidence, and was verified using mtDNA 12S rRNA sequences.(Simons & Mayden 1997)

Bala shark

Scientific classification

Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Cypriniformes Family: Cyprinidae Genus: Balantiocheilos Species: B. melanopterus

The Bala shark, Balantiocheilos melanopterus, also known as the tricolor shark, silver shark, or shark minnow, is a fish species of the family Cyprinidae, and is one of the two species in the genus Balantiocheilos. This species is not a true shark, but is commonly called a "shark" because of its torpedo-shaped body and large fins.

Escolar

Scientific classification

Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Perciformes Family: Gempylidae Genus: LepidocybiumGill, 1862

The escolar, Lepidocybium flavobrunneum, is a species of fish in the family Gempylidae. It is found in deep (200–885 m) tropical and temperate waters around the world. It is also known as Snake Mackerel, and sometimes marketed as "butterfish" or "white tuna", a controversial practice due to potential health problems related with consumption of the fish[1]