Tsela e tloaelehileng eo maruarua a tsamaeang ka eona ke efe?
Hangata maruarua a humpback a iphepa likhoeling tsa lehlabula metsing a ruileng a Alaska, karolong e ka leboea ea Canada le karolong e ka bochabela ea Russia,' me a qala ho fallela metsing a futhumetseng a Hawaii kapa Mexico ho qala bohareng ba hoetla ho ea ikatisa. Ho falla ha tsona ho nka libeke tse ka bang tse tšeletseng ho isa ho tse robeli'me li qala ho fihla Hawaii qetellong ea October / mathoasong a November. Li lula libakeng tse futhumetseng ho ikatisa le ho beleha bana ba tsona nakong ea mariha,'me li qala ho fallela libakeng tsa polar qetellong ea March kapa April. Ho hakanngoa hore maruarua a ka bang 14 000 a fallela Hawaii mariha a mang le a mang.