Chromodoris Nudibranch

Photo: Mike Krampf · CC BY-NC

Dutch Bay Wall hosts at least 12 recorded nudibranch species, with Chromodoris willani among the most photogenic — its white body striped in electric blue and black drawing the eye immediately against the encrusting sponge communities it grazes. Nudibranchs are chemical-ecology sentinels: their diversity indicates a healthy and chemically complex sponge community underpinning the broader food web. Night dives reliably reveal species that remain concealed in crevices during daylight, doubling the species count for attentive macro photographers.