Immature Colossal Squid Likely Inhabit Shallower Waters Than Adults

Young colossal squid may begin life closer to the ocean surface before descending into the abyss.

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Smaller specimens have occasionally been captured at midwater depths significantly above the adult range.

Marine biologists believe juvenile Mesonychoteuthis hamiltoni occupy shallower depths, gradually migrating deeper as they mature, a pattern observed in related deep-sea cephalopods.

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This vertical migration strategy reduces competition between age groups and may protect juveniles from the largest deep-diving predators until they reach substantial size.

Ontogenetic depth shifts are common in marine species, and understanding them helps researchers model population distribution in the largely inaccessible Antarctic deep sea.

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Deep Sea Research Part I

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