A swarm of orange and purplish organisms in a high tidal pool (supralittoral zone) with a piece of kelp and rock crabs in crevices.
"Tigriopus californicus is an intertidal copepod species that occurs on the Pacific coast of North America. This species has been the subject of numerous scientific studies on subjects ranging from ecology and evolution to neurobiology." wikipedia
For more info: https://www.algaebarn.com/a-closer-look-at-the-harpacticoid-copepod-tigriopus-californicus/