Sleeper sharks live in in very cold water. Being cold blooded, their metabolic rate & so, their movements are very slow. So how are they able to catch & eat the warm blooded (& so, much faster moving) seals?
http://www.wired.com/wiredscience/2012/06/sleeper-sharks-slurp-snoozing-seals/
/ Greenland Somniosus microcephalus squat cigar shaped fish grows up to 21 feet long swimming slow-motion sleep brain /
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