spinner shark spinner shark species requiem shark family named spinning leaps makes feeding strategy species occurs tropical warm temperate waters worldwide eastern pacific_ocean found coastal offshore habitats depth prefers shallow water spinner shark resembles larger version shark slender body long snout black marked fins species distinguished shark dorsal fin different shape placed black tip anal fin adults maximum length spinner sharks swift predators feed wide variety small bony fishes cephalopods feeding schools forage fish speed vertically school spinning axis water end like members family spinner shark viviparous females bearing litters young year born shallow nursery areas near coast relatively fast growing species usually dangerous humans excited food spinner sharks valued commercial fisheries range meat fins liver oil skin strong fighters recreational iucn assessed species worldwide vulnerable southeastern united_states taxonomy phylogeny spinner shark originally described der based mounted skin long specimen collected java species subsequently moved genera placed genus tooth shape coloration species varies significantly age geographical regions caused taxonomic confusion common names include shark great shark shark large shark long nose grey shark grey shark based similarities morphology tooth shape behavior closest relatives spinner shark originally believed shark graceful shark interpretation supported analysis suggested similarities product evolution closest relative spinner shark copper shark dna study spinner shark found genetically requiem shark species examined save tiger shark related species lemon shark distribution habitat uncertainty exists distribution data spinner shark confusion shark western atlantic_ocean occurs north_carolina northern gulf_of_mexico including bahamas cuba southern brazil argentina eastern atlantic occurs north_africa indian_ocean found south_africa madagascar red_sea india nearby islands java sumatra pacific_ocean occurs japan vietnam australia possibly philippines evidence suggests indian_ocean spinner sharks passed suez_canal mediterranean_sea migrants spinner shark reported ocean surface depth prefers water deep occupies levels water column species found coastal waters offshore continental shelves juveniles known enter bays avoid conditions northwest atlantic known migratory spring summer found warm waters winter south deeper water description average spinner shark long weighs species maximum known length weight sharks generally larger northwest atlantic species slim streamlined body distinctive long pointed snout eyes small circular prominent forward pointing furrows corners mouth tooth rows number half upper jaw half lower jaw tiny central teeth respectively teeth long narrow central finely upper jaw smooth lower jaw pairs gill slits long dorsal fin relatively small usually originates free rear tip pectoral fins ridge exists second dorsal fins pectoral fins moderately short narrow shaped body densely covered diamond shaped dermal denticles seven rarely shallow horizontal ridges coloration gray bronze white faint white band sides young individuals unmarked fins tips second dorsal fin pectoral fins anal fin lower caudal fin lobe fins black larger individuals spinner shark differs shark dorsal fin slightly triangular shape placed body adults distinguished black tip anal fin biology ecology spinner shark fast active swimmer forms large schools segregated age sex young individuals prefer cooler water temperatures adults south_africa females found close shore year round males appear summer smaller spinner sharks preyed larger sharks known parasites spinner shark include nemesis shark gills skin mouth gill arches rear margins fins feeding spinner sharks feed primarily small bony fish including herring sea tongue known eat squid octopus groups spinner sharks found pursuing schools prey high speed individual prey seized shark lacks cutting species employs unusual tactic feeding schools small fish shark charges vertically school spinning axis mouth open snapping shark momentum end runs carries air giving common shark performs behavior madagascar spinner sharks follow migrating schools like sharks shrimp feed discarded feeding life history like requiem sharks spinner shark viviparous adult females single functional functional divided compartments embryo embryos initially sustained yolk sac embryo grows long supply yolk exhausted yolk sac develops connection mother provides nutrients remainder gestation species smallest relative fully developed embryo viviparous shark known females birth usually seven pups year gestation period months mating occurs early spring summer august north_africa april south_africa march april northwestern atlantic young coastal nursery areas bays beaches high water deeper length birth northwestern atlantic tunisia south_africa spinner sharks relatively fast growing sharks year year year olds year year adults northwestern atlantic males mature long females long corresponding ages years years respectively south_africa males mature females spinner sharks generally reproduce years old maximum lifespan estimated years human interactions spinner sharks pose substantial danger humans perceive large mammals prey small narrow teeth adapted cutting excited presence food caution species encountered listed attacks provoked attack spinner shark fatal meat spinner shark high quality sold fresh dried addition fins shark fin soup liver oil processed skin leather products spinner sharks important catch commercial shark fisheries operating northwestern atlantic gulf_of_mexico meat marketed shark united_states species considered superior quality consumers likely caught fisheries range going owing confusion shark spinner shark highly regarded recreational described spectacular fighter leaps water iucn assessed spinner shark worldwide vulnerable northwest atlantic frequent use coastal habitats render vulnerable human exploitation habitat degradation fishery species managed fishery management plan sharks purposes commercial recreational bag limits spinner shark categorized large coastal shark
Spinner shark