Winterisonitsway.Caribbeanspinylobstersmakealongchain.It’stimefortheiryearlytrip,or migration.

Manyanimalsmigrate.Thismeanstheymovefromoneplacetoanother.Theylookforfood.Theylookforplacestohavebabies.Howdothelobstersknowwhentogo?Infall,daysgrowshorter.Thewatergetscolder.Thistellsthelobsterstobeontheirway.

Earthisabigmagnetinthecenter.Someanimalscanfeelit.Theyuseittofindtherightway.Thelobstersuseit,too.