Eutonina indicans (Romanes, 1876) :  Umbrella Jelly
Phylum Cnidaria / Class Hydrozoa / Order Leptomedusae / Family Eirenidae

This inconspicuous hydromedusa is easily overlooked. With a transparent bell and relatively small size (25 to 35 mm maximum bell diameter), only a careful search will reveal its presence. The most conspicuous part of the body are the four radial canals, each with attached gonads, which form a distinctive pattern. The mouth has four frilly lips and extends below the bell margin on a conical peduncle. Up to 200 fine, short tentacles line the margin of the bell. A variety of small prey include invertebrate eggs and larvae, copepods and other small hydromedusae. In Monterey Bay this jelly is relatively uncommon. In other locations, such as the San Juan Islands and Vancouver Island, it can occur in dense aggregations in nearshore surface waters, mainly during spring and summer months. Eutonina can be found from southern California to the Aleutian Islands and areas off Russia and northern Japan. It is relatively easy to establish hydroid colonies and culture umbrella jellies in captivity. When provided appropriate aquarium conditions, such as a pseudokreisel or even a rectangular tank with a screen on one end, the medusae do well under captive conditions.

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