The sicklefin smooth-hound (''Mustelus lunulatus'') is a

houndshark Houndsharks, the Triakidae, are a family of ground sharks, consisting of about 40 species in nine genera. In some classifications, the family is split into two subfamilies, with ''Mustelus'', '' Scylliogaleus'', and '' Triakis'' in the subfamily ...

of the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Triakidae. Even some species look similar to Carcharhinus family, mustelus second dorsal fin is much bigger. It is found on the

continental shelves A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an island ...

of the eastern

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

, between

latitude In geography, latitude is a coordinate that specifies the north– south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north pol ...

s 33° N and 7° N. The difference between sharptooth smooth-hound (Mustelus dorsalis) and mustelus lunulatus, is that the lunulatus second dorsal fin origin far in advance of the anal fin. It can reach a length of up to 1.7 m (5 ft 7 in). The reproduction of this shark is

ovoviviparous Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop insi ...

. Mustelus lunulatus head3.jpg Mustelus lunulatus head4.jpg

References

sicklefin smooth-hound Fish of the Gulf of California Fish of Mexican Pacific coast Western Central American coastal fauna sicklefin smooth-hound Taxa named by David Starr Jordan Taxa named by Charles Henry Gilbert {{Shark-stub