The movement of the hard drive's read/write heads over different areas of the disk when accessing fragmented files is slower, compared to accessing the entire contents of a non-fragmented file sequentially without moving the read/write heads to seek other fragments.
The dorsal fins are small and at the base of the tail. The largest mantas can reach 1,350 kg (2,980 lb). In both species the width is approximately 2.2 times the length of the body; M. birostris reaches at least 7 m (23 ft) in width while M. alfredi reaches about 5.5 m (18 ft).
Manta Rays are sea animals, they are relatives of the shark. they look like sting rays, but manta rays are a lot bigger. 12 people found this useful. Edit. Share to:  1 Ray: An Inspiring Movie About a Musical Icon Ray is a biographical drama about the life of musician Ray Charles.