The walrus carries on an amphibian life; when the Arctic region was still crowded by walruses and the immense aggregations were formed by countless families, a walrus had to swim quite a lot for reaching the mainland.
Il tricheco svolge vita anfibia, quando l’Artide era ancora affollato di trichechi e gli immensi branchi erano formati da innumerevoli famiglie, un tricheco doveva nuotare parecchio prima di raggiungere la terraferma.