About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 28. Chapters: Gill, Ovipositor, Shark tooth, Otolith, Weberian apparatus, Swim bladder, Fish scale, Ampullae of Lorenzini, Kinocilium, Hepatopancreas, Lateral line, Hyomandibula, Digital Fish Library, Barbel, Fish measurement, Pharyngeal teeth, Gill raker, Meristics, Lucky stone, Fish development, Pharyngeal jaw, Branchial arch, Operculum, Flipper, Spiral valve, Photophore, Gill slit, Physoclisti, Leydig's organ, Clasper, Papilla, Supraesophageal ganglion, Pseudobranch, Polyphydont, Physostome, Glossohyal, Anguilliformity, Operculum papillare, Palatoquadrate, Pigment spot ocellus. Excerpt: Fish anatomy is primarily governed by the physical characteristics of water, which is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs more light than air does. The anatomy of Lampanyctodes hectoris(1) - operculum (gill cover), (2) - lateral line, (3) - dorsal fin, (4) - adipose fin, -- (5) - caudal peduncle, (6) - caudal fin, (7) - anal fin, (8) - photophores, -- (9) - pelvic fins (paired), (10) - pectoral fins (paired)The fins are the most distinctive features of a fish, composed of bony spines protruding from the body with skin covering them and joining them together, either in a webbed fashion, as seen in most bony fish, or more similar to a flipper, as seen in sharks. These usually serve as a means for the fish to swim. Fins can also be used for gliding or crawling, as seen in the flying fish and frogfish. Fins located in different places on the fish serve different purposes, such as moving forward, turning, and keeping an upright position. In bony fish, most fins may have spines or rays. A fin may contain only spiny rays, only soft rays, or a combination of both. If both are present, the spiny rays are always anterior. Spines are generally stiff and sharp. Rays are generally soft, flexible, segmented, ...
