Since they were deeper than 2 meters, and the water was somewhat murky, the jellies were not particularly conspicuous while boating. In the same vicinity, you could also observe packs of moon jellies, also deeper than 2 meters. This species is more typically found in quiet, shallow waters and in harbors. All were relatively small, with bell diameters of no more than about 1 cm. They were concentrated from near the surface to about 3 or 4 meters depth.
Cross jellies are transparent and easy to overlook.
Also in the mix were scattered Beroe and the lobate comb jellies Bolinopsis and Leucothea . If you took a careful look you may also have seen the siphonophore, Nanomia bijuga . This relatively small species has transparent swimming bells, a gas-filled float, and highly contractile tentacles. On the other side of the peninsula in Monterey Bay, sea nettles continued their domination. Beyond the kelp beds of Pacific Grove, these stingers formed decent swarms from near the surface to about 10 meters.