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The two currently recognized extant species in this genus are: [5] Alepisaurus brevirostris Gibbs, 1960 (short-snouted lancetfish) Alepisaurus ferox R. T. Lowe, 1833 (long-snouted lancetfish) The anatomic difference between the two species is the shape of the snout, which is long and pointed in A. ferox, and slightly shorter in A. brevirostris.
Depending on the exact species involved, the maximum length of lancelets is typically 2.5 to 8 cm (1.0–3.1 in). [47] [48] Branchiostoma belcheri and B. lanceolatum are among the largest. [47] Except for the size, the species are very similar in general appearance, differing mainly in the number of myotomes and the pigmentation of their larvae ...
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Astronaut photo of Cape Town showing the Cape Peninsula, and surrounding waters, including False Bay. Map showing approximate extent of the range of the article and identifying key locations and the borders of the Table Mountain National Park Marine Protected Area Marine ecoregions of the South African exclusive economic zone Marine species distribution reference map of the Southern African ...
Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and the proportion of undescribed species is very high. Many taxa remain poorly studied.
Endangered (EN) species are considered to be facing a very high risk of extinction in the wild. In September 2016, the International Union for Conservation of Nature (IUCN) listed 643 endangered fish species. [1] Of all evaluated fish species, 4.2% are listed as endangered. The IUCN also lists ten fish subspecies as endangered.
The earliest known photograph of an intact giant squid, showing the arms, tentacles and buccal region of the head (including beak) of a specimen from Logy Bay, Newfoundland (#30 on this list), draped over Reverend Moses Harvey's sponge bath, November or December 1873.
The following is the full list of the extant species in Class Chondrichthyes, or the cartilaginous fish. Members of this class have a backbone , gills , no swim bladder , jaws , and a skeleton made of cartilage , a soft, strong material as a replacement for bone .