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The black endostyle is visible below the oral siphon, as well as a mid-dorsal black line below the atrial siphon. [ 11 ] Clavelina ossipandae is also recognizable by the black markings on its white anterior portion (a central dot between the oral and atrial siphons, surrounded by two lateral bands), uniquely distinctive in the genus Clavelina .
The endoskeleton of the fish is made up of two main components: the axial skeleton consisting of the skull and vertebral column, and the appendicular skeleton supporting the fins. [7] The fins are made up of bony fin rays and, except for the caudal fin, have no direct connection with the spine.
Fish bone is any bony tissue in a fish, although in common usage the term refers specifically to delicate parts of the non-vertebral skeleton of such as ribs, fin spines and intramuscular bones. Not all fish have fish bones in this sense; for instance, eels and anglerfish do not possess bones other than the cranium and the vertebrae.
After the appearance of jawed fish (placoderms, acanthodians, sharks, etc.) about 420 million years ago, most ostracoderm species underwent a decline, and the last ostracoderms became extinct at the end of the Devonian period. More recent research indicates that fish with jaws had far less to do with the extinction of the ostracoderms than ...
Mustelus palumbes J. L. B. Smith, 1957 (White-spotted smooth-hound) Mustelus punctulatus A. Risso, 1827 (Black-spotted smooth-hound) Mustelus ravidus W. T. White & Last, 2006 (Australian grey smooth-hound) Mustelus schmitti S. Springer, 1939 (Narrow-nose smooth-hound) Mustelus sinusmexicanus Heemstra, 1997 (Gulf smooth-hound)
Contour drawing – Chiaroscuro – using strong contrasts between light and dark to achieve a sense of volume in modeling three-dimensional objects such as the human body. Gesture Drawing - loose drawing or sketching with the wrists moving, to create a sense of naturalism of the line or shape, as opposed to geometric or mechanical drawing ...
In fish anatomy and turtle anatomy, a barbel is a slender, whiskerlike sensory organ near the mouth (sometimes called whiskers or tendrils). Fish that have barbels include the catfish , the carp , the goatfish , the hagfish , the sturgeon , the zebrafish , the black dragonfish and some species of shark such as the sawshark .
The harlequin rasbora is a shoaling fish, [2] and should be kept in a group comprising a minimum of six individuals, though shoals of larger numbers are preferable not only from the standpoint of the well-being of the fish, but from an aesthetic standpoint—a large shoal of harlequin rasboras presents a striking vista even to non-fishkeepers ...