Thewinterstormsareontheirway.Caribbeanspinylobstersformalongchain.Withtheirantennae,theytouchthebacksofthelobstersaheadofthem.It’stimefortheirannualjourney,or migration.
Beforewinterbegins,theselobstersleaveshallowwaters.Theyseekoutdeeper,warmerwater.Here,thewavesarelesschoppy.Theoceanfloorisstill.Foodismoreplentiful.
Weknowthatmanyanimalsmigrate.Theymovefromplacetoplace,oftenatspecifictimesorseasons.Why?Tosearchforfoodorforplacestobreed.Whatdrivestheselobstersto move?
MarineMarch
Infall,thedaysareshorter.
Thereisasharpdropinwatertemperatures.Thissendsthelobstersontheirway.Theyknowtheunderwaterlandscape.Buttheyarealso guidedbyEarth’smagneticfield.
How?Someanimalshavesmallparticlesofa magneticmineralintheirbrains.ThismineralmayreacttoEarth’smagneticfield.Itmayactivatenervesandsendmessagestothebrainthathelpanimalsknowwhichdirectionto go.
antenna
Caribbeanspinylobsterslinktogetherwhentheymigrateacrosstheoceanfloor.