Overview

Comprehensive Description

Biology/Natural History: Feeds on small crustaceans. Eaten by Calliostoma annulatum snail. This animal is a true medusa (jellyfish). It can glide along on the base of the stalk (which is the center of the exumbrella), contract the stalk or fold the calyx of the umbrella. If it becomes detached it clings to the substrate with the tentacles until the disk can reattach. It is not a good swimmer. Spawns in the summer in the San Juans, producing tiny 35 micron eggs. Eggs develop into a creeping, non-ciliated, wormlike larva which settles after a few days and develops its first nematocysts within a week. Juveniles may be able to encyst and overwinter.

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© Rosario Beach Marine Laboratory

Source: Invertebrates of the Salish Sea

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This small attached jellyfish has 8 well-developed marginal lobes tipped with clusters of tentacles. The marginal anchors between the tentacle clusters are egg-shaped, not expanding into broad cups, and with inconspicuous stalks. Gonads nearly reach to the ends of the lobes (not easily seen). Total length up to 2.5 cm. Variable in color, from yellowish to orange, olive green, or reddish brown.
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© Rosario Beach Marine Laboratory

Source: Invertebrates of the Salish Sea

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Distribution

Geographical Range: Alaska to Puget Sound; Japan

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© Rosario Beach Marine Laboratory

Source: Invertebrates of the Salish Sea

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Physical Description

Type Information

Syntype for Haliclystus stejnegeri Kishinouye, 1899
Catalog Number: USNM 18942
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Formalin
Collector(s): L. Stejneger
Year Collected: 1897
Locality: Commander Islands, Bering Island, Off Nikolski, Kamchatka, Russia, Bering Sea, North Pacific Ocean
  • Syntype:
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© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Look Alikes

How to Distinguish from Similar Species: Haliclystus salpinx has broad trumpet-shaped anchors with conspicuous stalks, and its gonads extend into the lobes for only about half their length.
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© Rosario Beach Marine Laboratory

Source: Invertebrates of the Salish Sea

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Ecology

Habitat

Depth range based on 1 specimen in 1 taxon.

Environmental ranges
  Depth range (m): 2 - 2
 
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Depth Range: Low intertidal and subtidal

Habitat: Usually found on blades of kelp or eelgrass.

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© Rosario Beach Marine Laboratory

Source: Invertebrates of the Salish Sea

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