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Sea Star Cluster

Last weekend I was out on a seaweed gathering trip to a shoreline location that was not very protected. While I was there I took this photo of a cluster of ochre sea stars (Pisaster ochraceus) in a somewhat protected cranny of the bedrock shoreline. It’s not unusual to find such clusters of these sea stars, and this time it occurred to me that they can’t all be getting food to eat there, so they must forage elsewhere. I am now curious about the foraging patterns and clustering behavior of these sea stars.

Some questions that come to mind:

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