How do cuttlefish and squid breeding migrations affect where they are found?

Breeding seasons have a significant impact on the local distribution of certain cephalopods, as these animals often migrate to specific environments to reproduce.1

For the common cuttlefish, breeding migrations involve moving into shallow coastal waters during the spring and summer months. Outside of these breeding periods, cuttlefish typically inhabit shallow tropical or temperate coastal waters but are known to migrate to deeper water during the winter.12

Similarly, various species of squid—such as those in the genera Loligo, Alloteuthis, and Illex—exhibit comparable migratory patterns related to their breeding cycles. These movements are essential to their life history, as they shift the population's presence from one habitat to another based on reproductive requirements. While some pelagic and planktonic cephalopods follow broader distribution patterns similar to other marine animals, these specific seasonal migrations ensure that individuals congregate in suitable areas for spawning.1