P. De Benedictis 1964 5 10 Jan on board "Golden Bear" off San Mateo Co., Calif. very windy & cold on the ocean; not many white caps but the boat is moving fast both quite a bit. Until about 5 PM saw about another 200 fulmars, over 75% black or intermediate phase. Saw 1 eating a brown jellyfish (? Chrysaora) and may have flushed a second away from sight. Most of the light phase birds are together so that one sees them a lot and then mostly dark birds. Birds moving singly, in flight or on the water, and often can be seen looking into water. Only interaction was a light bird which swam broad, the dark bird eating the jelly fish. Shortly south of Half Moon bay we went through a large feeding assemblage of gulls (10+ Kithwakes, a few black tips), 100+ Fulmars, 150-200 Rhinoceros Auklets, 25-30 Murres, and a few large gulls. South of here for about half an hour we saw Rhinoceros Auklets almost constantly, with the ever present Fulmars, but there then petered out and all alcids were very scattered. Towards the end of the day, saw almost only fulmars and most of the gulls disappeared, except that a few Mewes had appeared, plus a Ringtail and a Calif. No puffins and no Storm Petrels.