One of the unique species of nudibranchs I wanted to see while in the Pacific Northwest, I was happy to find Hooded Nudibranchs (Melibe leonina). They are special in that while most nudibranchs feed on stationary prey like sponges, hydroids, and corals, the Hooded Nudi actually uses that hood to catch drifting prey from the water column – sort of like a jellyfish.