Two California market squids (Loligo opalescens) mate in the waters off of California's Channel Islands. While spawning, the male's arms blush red as he embraces the female, a warning to other competing males to back-off. Find out how and why squids and other cephalopods change color.
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California Market Squid
![Two California market squids mate in the waters off of California's Channel Islands.](/sites/default/files/styles/3_2_large/public/2023-11/loligo_squid_%28c%29BrianSkerry.jpg.webp?itok=GMwb5onf)