enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Shark anatomy - Wikipedia

    en.wikipedia.org/wiki/Shark_anatomy

    The tail of a shark consists of the caudal peduncle and the caudal fin, which provide the main source of thrust for the shark. Most sharks have heterocercal caudal fins, meaning that the backbone extends into the (usually longer) upper lobe. The shape of the caudal fin reflects the shark's lifestyle, and can be broadly divided into five categories:

  3. Sarcopterygii - Wikipedia

    en.wikipedia.org/wiki/Sarcopterygii

    Sarcopterygii (/ ˌ s ɑːr k ɒ p t ə ˈ r ɪ dʒ i. aɪ /; from Ancient Greek σάρξ (sárx) 'flesh' and πτέρυξ (ptérux) 'wing, fin') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) 'fringe') — is a clade (traditionally a class or subclass) of vertebrate animals which includes a group of bony fish commonly referred to as lobe ...

  4. Fish fin - Wikipedia

    en.wikipedia.org/wiki/Fish_fin

    They have fleshy, lobed, paired fins, which are joined to the body by a series of bones. [17] The fins of lobe-finned fish differ from those of all other fish in that each is borne on a fleshy, lobe-like, scaly stalk extending from the body. Pectoral and pelvic fins have articulations resembling those of tetrapod limbs.

  5. Shark - Wikipedia

    en.wikipedia.org/wiki/Shark

    The value of shark fins for shark fin soup has led to an increase in shark catches where usually only the fins are taken, while the rest of the shark is discarded, typically into the sea; health concerns about BMAA in the fins now exists regarding consumption of the soup A 4.3-metre (14 ft), 540-kilogram (1,200 lb) tiger shark caught in Kāne ...

  6. Milk shark - Wikipedia

    en.wikipedia.org/wiki/Milk_shark

    The first dorsal fin originates over the pectoral fin free rear tips, and the much smaller second dorsal fin originates over the last third of the anal fin base. The dorsal fins do not have a ridge between them. The lower lobe of the caudal fin is well-developed and the upper lobe has a ventral notch near the tip. This shark is plain gray ...

  7. Blacktip reef shark - Wikipedia

    en.wikipedia.org/wiki/Blacktip_reef_shark

    There is no ridge between the dorsal fins. This shark is a pale grayish-brown above and white below, with an obvious white band on the sides extending forward from above the anal fin. All the fins have black tips highlighted by lighter-colored borders, which are especially striking on the first dorsal fin and lower caudal fin lobe. Most ...

  8. Spinner shark - Wikipedia

    en.wikipedia.org/wiki/Spinner_shark

    Young individuals have unmarked fins; the tips of the second dorsal fin, pectoral fins, anal fin, and lower caudal fin lobe (and sometimes the other fins, as well) are black in larger individuals. The spinner shark differs from the blacktip shark in that its first dorsal fin is slightly more triangular in shape and is placed further back on the ...

  9. Horn shark - Wikipedia

    en.wikipedia.org/wiki/Horn_shark

    The fin spines of reef-dwelling horn sharks are shorter than those living in algal habitats, as their spines become worn down on rocks from the sharks' movements. [3] The first dorsal fin originates over the bases of the large pectoral fins , while the second dorsal fin originates slightly anterior to the free rear tips of the pelvic fins .