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Squaliform sharks are extremely variable in size and shape, and can be found in most marine habitats throughout the world. Like Hexanchiformes, members of Squaliformes can be found as early as the Jurassic period. [3] There are around 120 species in 22 genera, and 6 families. Family Centrophoridae (Gulper sharks) Family Dalatiidae (Kitefin sharks)
The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
Galeomorphii is a superorder of sharks.They are sometimes called galea or galean sharks.There are about 300 living species in 23 families.Galean sharks are divided into four orders: the Heterodontiformes, Orectolobiformes, Lamniformes, and Carcharhiniformes.
The hearing sensitivity for most shark species lies between 20 and 1000 Hz. [63] A small opening on each side of their heads (not the spiracle) leads directly into the inner ear through a thin channel. The lateral line shows a similar arrangement, and is open to the environment via a series of openings called lateral line pores. This is a ...
The hammerhead sharks are a group of sharks that form the family Sphyrnidae, named for the unusual and distinctive form of their heads, which are flattened and laterally extended into a cephalofoil (a T-shape or "hammer"). The shark's eyes are placed one on each end of this T-shaped structure, with their small mouths directly centered and ...
A weird fact is that honey never spoils; archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly good to eat! Image credits: MysticMelo24 #7
Kitefin sharks are small, under 2 m (6.6 ft) long, and are found worldwide. They have cigar-shaped bodies with narrow heads and rounded snouts. Several species have specialized bioluminescent organs. [11] The term kitefin shark is also used as the common name for the type species of the family, Dalatias licha. Echinorhinidae: Bramble sharks: 1 2
The sandbar shark itself preys on fish, rays, crabs, and molluscs. [7] They have also been found to primarily consume osteichthyes, or bony fish, octopi, european squid, and cuttlefish when in areas such as the Mediterranean or the Gulf of Gabés. [8] Sandbar sharks have been described as being a top predator in their ecosystem's food chain. [9]