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 giant oceanic manta ray can grow to a disc size of up to 7 m (23 ft) with a weight of about 1,350 kg (2,980 lb) but average size commonly observed is 4.5 m (15 ft). It is dorsoventrally flattened and has large, triangular pectoral fins on either side of the disc.
Humans are the biggest predators of the Manta Ray. In many parts of the world hunting for them continues to be a huge industry. This includes areas of Mexico, California, and Australia.Manta Rays are hunted for their meat, for their skin that feels like sandpaper, and for their oil.