INDEPENDENT : SEA SLUGS AS EL NINO FORCASTERS
EXCERPT:
Hopkins’ rose nudibranchs , as the sea slugs are known, travel as larvae at the whim of warm ocean currents, floating to the bottom as they grow during their first couple months. There they feed exclusively on a pink-colored bryozoan — a diminutive aquatic organism known as a “moss animal” that clusters in colonies — which grows all the way up to British Columbia and imparts the Okenia rosacea‘s remarkable color. Goddard knew that spotting the nudibranchs in high numbers near Morro Bay in mid-January was significant, since they usually hunt down in Southern California. They reminded him of the flourishing pink populations he’d seen near Santa Cruz during 1977’s weak El Niño.
After Morro, Goddard headed up to Monterey to check the tidepools. Along with reports from researchers at UC Santa Cruz, the Bodega Marine Laboratory, and San Francisco’s California Academy of Sciences, his hypothesis was confirmed: The little creatures were everywhere, as far north as Humboldt — sometimes by the dozens per square meter....
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