蓝鲸英语作文30个单词作业帮

The blue whale is the largest animal that ever lived on Earth.It is also the loudest animal on Earth.These enormous mammals eat tiny organisms,like plankton and krill,which they sieve through baleen.They live in pods .These gray blue whales have 2 blowholes and a 5 30 cm thick layer of blubber.Blue whales are rorqual whales,whales that have pleated throat grooves that allow their throat to expand during the huge intake of water during filter feeding.Blue whales have 50 70 throat grooves that run from the throat to mid body.