marine mammal

Marine mammals are aquatic mammals that rely on the ocean and other marine ecosystems for their existence. They include animals such as seals, whales, manatees, sea otters and polar bears. They do not represent a distinct taxon or systematic grouping, but rather have a polyphyletic relation due to convergent evolution, as in they do not have an immediate common ancestor. They are also unified by their reliance on the marine environment for feeding. Marine mammal adaptation to an aquatic lifestyle varies considerably between species. Both cetaceans and sirenians are fully aquatic and therefore are obligate water dwellers. Seals and sea-lions are semiaquatic; they spend the majority of their time in the water, but need to return to land for important activities such as mating, breeding and molting. In contrast, both otters and the polar bear are much less adapted to aquatic living. Their diet varies considerably as well; some may eat zooplankton, others may eat fish, squid, shellfish, sea-grass and a few may eat other mammals. While the number of marine mammals is small compared to those found on land, their roles in various ecosystems are large, especially concerning the maintenance of marine ecosystems, through processes including the regulation of prey populations.
Ocean in Cape Town. - View of the ocean in Cape Town.
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Ocean in Cape Town.

Added 2 weeks ago by Zeta

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hjhjhjhjhjhjhjhjhjhjhjhj - hjhjhjhjhjhjhjhjhjhjhjhj
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hjhjhjhjhjhjhjhjhjhjhjhj

Added 2 months ago by Oskar

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Sharks 2 - shark sharks
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Sharks 2

Added 3 months ago by ASK

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lovely animals - walrus - seal
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lovely animals

Added 3 months ago by Basiunia

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Cooperation - complicated puzzle
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Cooperation

Added year ago by andi

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Where is Nemo - The film is about kidnapping a small fish named Nemo. His dad Marlin sets out to look for his son, a
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Where is Nemo

Added year ago by nemo

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Cinderella - Cinderella in a ball gown at the ball
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Cinderella

Added year ago by Aga

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Anime Girl - Wallpaper Anime Girl
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Anime Girl

Added year ago by VRAINS

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lovely animals - a whale emerging from the water
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lovely animals

Added year ago by Izabela

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extremely - three dolphins and coral reefs
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extremely

Added year ago by stachna

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malutha seal - animal beauty
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malutha seal

Added year ago by renulek

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delfiny dwa - tańczące delfiny w morzu
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delfiny dwa

Added year ago by Bogna

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Tańczący delfin - tańczący delfin cieszacy sie życiem, swobodą
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Tańczący delfin

Added year ago by irena

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Z serii zwierzęta - A ten kwiatek to dla Was:)
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Z serii zwierzęta

Added over a year ago by Marysia

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Dziewczyna z anime - Dziewczyna z niebieskimi włosami
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Dziewczyna z anime

Added over a year ago by Weronika

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Dziewczyna z anime - Dziewczyna z długimi niebieskimi włosami
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Dziewczyna z anime

Added over a year ago by Weronika

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Dziewczyna z anime - Dziewczyna Ładny Obrazek
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Dziewczyna z anime

Added over a year ago by Weronika

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morskie zwierzątka - żółwie,rybki iryby
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morskie zwierzątka

Added over a year ago by stachna

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gang delfinów - delfiny,skaczą,woda,spływająca woda
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gang delfinów

Added over a year ago by wieslawa

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ale widok - wieloryb a statek na nim
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ale widok

Added over a year ago by Basieńka

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kolorowe rybki - pływające kolorowe rybki
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kolorowe rybki

Added over a year ago by irena

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Dolphins Sea - Dolphins Sea Wallpaper
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Dolphins Sea

Added over a year ago by princess in the night

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życie na rafie koralowej - woda różnorodność,kolory,wielkość,
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życie na rafie koralowej

Added over a year ago by wieslawa

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Manga Anime - Ładna Słodka Foczka
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Manga Anime

Added over a year ago by Weronika

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równolegle leżą - czy oni się opalają na plaży
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równolegle leżą

Added over a year ago by Basieńka

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summer, lato - ładna pogoda w lecie
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summer, lato

Added over a year ago by Basieńka

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ocean i delfinarium - ocean i delfinarium rybki nemo
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ocean i delfinarium

Added over a year ago by Nikola

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róża w kuli - woda, róża, kula,pamiątka
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róża w kuli

Added over a year ago by ułóż puzzle

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delfiny delfiny - delfiny delfiny delfiny
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delfiny delfiny

Added over a year ago by Nikola

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niebieski delfin - piękny niebieski delfin
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niebieski delfin

Added over a year ago by z życia wzięte

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