cloudy cloudy common species belonging family inhabits rocky reefs northwestern pacific_ocean shore depth growing long small slim shark narrow head short blunt snout grooves nostrils mouth furrows lower upper jaw characterized extremely rough skin coloration consisting series dark brown tail darker lighter spots larger individuals diet cloudy consists crustaceans bony fishes females laying eggs time nursery areas male bear numerous hooks likely serve facilitate harmless shark readily maintained captivity model organism biological research caught incidentally generally discarded commercial fisheries activities appear negatively affected population leading listed concern taxonomy original description cloudy published gave specific epithet japanese literally tiger shark assigned genus type specimen long adult male caught japan subsequent authors description cloudy reaches long thin deep firm body narrow head makes slightly sixth total length thirds wide long snout short rounded large nostrils preceded small triangular flaps skin reach wide mouth medium sized eyes horizontally oval equipped rudimentary membranes protective followed moderate grooves nostrils mouth furrows extending corners mouth lower jaw small teeth long central typically flanked pairs pairs gill slits short fourth pair pectoral fin origins dorsal fins placed body originating rear pelvic fin bases dorsal fin rounded apex larger second dorsal fin angular shape pectoral pelvic fins moderate size males inner margins pelvic fins merged form apron long cylindrical origin anal fin lies approximately dorsal fins caudal deep body leads low caudal fin indistinct lower lobe ventral notch near tip upper lobe skin thick rough dermal denticles large upright backward pointing teeth species brown sides indistinct darker dorsal plain yellowish ventral larger sharks large irregularly shaped light dark spots distribution habitat cloudy common northwestern pacific japan korea china possibly philippines dwelling nature species found shore depth continental shelf upper continental slope favors rocky reefs appear migratory biology ecology cloudy feeds primarily followed crustaceans bony fishes predator shark egg cases swell shark known parasite species reproduction adult females single functional functional prelude mating male bites female pectoral fin gill region grip body seconds minutes male unusual row hooks running inner margin hooks likely serve anchor male female female capable storing sperm organ egg cases months females produce mature eggs time eggs enclosed smooth translucent yellow shaped measuring long long corners capsule eggs laid defined nursery areas area located depth embryo long external gills undeveloped fins length external gills disappeared covering small denticles present length embryo developed fins generally resembles adult eggs months hatch months hatch newly hatched shark measures long maturation size tends increase decreasing water temperature northerly sexes mature long females remain immature long contrast southerly sexes mature long maximum lifespan years human interactions harmless humans cloudy captivity reproduced model organism physiology research september colleagues species perform successful artificial shark ray cloudy caught incidentally commercial fisheries fishing nets including captured individuals typically discarded possibly high survival rate fish discarded fisheries species fishery operating catch ton cloudy annually discarded despite heavy fishing pressure range cloudy remains common productive sharks result assessed concern cloudy number locations japan found contaminated acquire food likely source use ddt developing nations southern asia
Cloudy catshark