A few species such as the Bryde's whale and the round-headed dolphin are found only in tropical waters, Others such as the humpback whale or the huge blue whale migrate to the warm tropics only for reproduction and spend the remaining time in cold waters. The rare river dolphins live in warm muddy rivers such as the Amazon, Ganges, or Yangtze Kiang. Their eyes are rudimentary, since visibility is very poor.
No comments:
Post a Comment