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Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Rays of the World

Rays of the World

Hardcover

BiologyGeneral NatureMarine Life

Currently unavailable to order

ISBN10: 1501705326
ISBN13: 9781501705328
Publisher: Comstock Pub
Published: Jan 15 2017
Pages: 832
Weight: 6.95
Height: 2.20 Width: 8.36 Depth: 10.63
Language: English

Rays are among the largest fishes in the sea and have colonized all oceans. The first cousins of sharks, rays evolved from early Mesozoic or late Paleozoic shark-like ancestors. They also share with sharks many life history traits--all are carnivores or scavengers--and a multitude of morphological and anatomical characters, such as their skeletons built of cartilage. There are six families and 633 valid named species of rays, but additional undescribed species exist for many groups. Our knowledge of many of the ray species is based on only a small number of individuals, and few of them have been researched well enough to gain even a basic understanding of their biology and life history. The insights gained from molecular analyses of more than three-quarters of living ray species, combined with reinvigorated morphological investigations, have led to many changes in both ray classification and the underpinning species diversity. The recognition of whole new families and genera of rays, and many newly described species, have resulted from this research.

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Marine Life