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Dark coloured shrimp with its pigmentation spread
throughout its pigment cell
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Light coloured shrimp with its
pigmentation concentrated to the centre of the
cell
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Autumn migration
During September-October, when water temperatures
begin to decrease on shallow sandy bottoms, the shrimps migrate to deeper
water (5-20 m) to pass the winter where the water is warmer. The autumn
migration occurs at the same time as the shrimps became sexually active.
Migration seems to follow a specific pattern, where the most sexually
active migrate first. The least sexually mature individuals are left to
eat and grow in size.
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