[DOC] [TLE] Gray Whale Breaks Mammal Migration Record - Live Science [PAR] Apr 14, 2015 ... A female western gray whale swam from Russia to Mexico and back again  a ... 
Until now, the title of the longest-migrating mammal belonged to the humpback ... 
"She crossed the Bering Sea, the Gulf of Alaska [and] the lengths of the ... This 
map tracks the journeys of Vavara, Agent and Flex, three gray... [DOC] [TLE] Gray whale - Wikipedia [PAR] The gray whale (Eschrichtius robustus), also known as the grey whale, gray back 
whale, Pacific ... Although identity between the Atlantic and Pacific populations 
cannot be .... mi) is believed to be the longest annual migration of any mammal. ... 
The current western gray whale population summers in the Sea of Okhotsk,... [DOC] [TLE] Gray whale swims 14,000 miles into record books - CNN.com [PAR] Apr 15, 2015 ... (CNN) A North Pacific gray whale has earned a spot in the record books after 
completing the longest migration of a mammal ever recorded. [DOC] [TLE] Ensenada Whale Watching and Tours - Ensenada Mexico ... [PAR] From mid to late fall, gray whales make the longest migration of any mammal, ... 
summer homes in the Bering and Chukchi Seas between Alaska and Siberia, ... 
At the end of their 5,000 mile journey from the Bering Sea, hundreds of Pacific 
gray ... types of whale watching tours and trips in Ensenada Baja California, 
Mexico. [DOC] [TLE] Gray Whales: Migration - MarineBio.net [PAR] The gray whale migrates between its summer feeding grounds in the North ... (
June, July, and August) in the Bering Sea area between Alaska and Russia. ... 
This 12,000 mile roundtrip may be the longest migration of any mammal on Earth. 
... of feeding have been reported during the migration route and in Baja California
,... [DOC] [TLE] The Marine Mammal Center : Gray Whale [PAR] Gray whales are found only in the Pacific Ocean, with a population of 
approximately 26,000. ... in the Bering and Chukchi Seas and winter in the waters 
of Baja California, Mexico. ... Gray whales have one of the longest migrations of 
any mammal. ... migration, and again in March, April, and May on their northern 
journey. [DOC] [TLE] Whale Watching California - $20 Whale Watching Special [PAR] The migration route of the Eastern Pacific, or California, Gray Whale is often 
described as the longest known mammal migration. Beginning in the Bering Sea 
and ending in the warm-water lagoons of the Baja ... By mid-December to early 
January, the majority of the Gray whales are usually found between Monterey 
and San... [DOC] [TLE] 9 animals with extremely long migrations | MNN - Mother Nature ... [PAR] Dec 3, 2013 ... The length of animal migrations vary as much as the reasons for doing it. ... the 
wide open ocean  that is conducive to long-distance travel. ... Gray whale ... a 
year, spending the summer feeding in the waters between Alaska and Russia ... 
birds migrating a little more than 8,000 miles with the longest route... [DOC] [TLE] The 5 Best Places to go Whale Watching in the U.S. - Allied ... [PAR] Mar 21, 2016 ... ... mile journey between Alaska and Mexico  and then back again. ... See the 
migration of the gray whales, as well as other marine life that inhabits these 
waters. In fact, more than 27 types of whales and dolphins live under the ocean's 
... largest known animals to have ever existed), minke, humpback and,... [DOC] [TLE] Wild Whales  Grey Whale (Eschrichtius robustus) [PAR] The grey whale migration is one of the longest of any mammal (up to 15,000  
20,000 ... of Washington and British Columbia up to the high arctic in the Beaufort 
Sea. ... and fiercely protect them from attacking killer whales on their migration 
route. ... calving grounds in Mexico to their summer feeding areas in northern 
Alaska,... [DOC] [TLE] Gray whale smashes mammal migration record swimming almost ... [PAR] Apr 15, 2015 ... Gray whale smashes mammal migration record: 'Varvara' swam almost 14,000 ...

Question: The longest migration by this marine animal is the gray type's journey between Alaska & Mexico
Answer: whale