This hydroid medusa
has numerous (usually >100) unbranched tentacles originating at
of the bell
distributed around the bell
margin. The bell
is not opaque. The tentacle bases usually have an orange
have no ocelli.
The tentacles have no prominent rings of nematocysts.
The four broad radial
canals have jagged edges but do not branch nor do they have
diverticula. The gonads are associated with the
with the radial
canals. The height of the bell
is greater than or equal to its diameter and the jelly is thick at the
apex of the bell.
has an orange tinge (this one doesn't appear to (photo)).
Bell height to 5.3 cm.
and Shearer, 1902)
2 cm diameter, Collected from Rosario Strait
|(Photo by: Dave
Cowles, August 2010)
How to Distinguish from
Similar Species: Catablema
multicirrata has a similar shape and many tentacles but
of the bell
has a large, bulbous projection and it doesn't have orange on it.
North Pacific (Bering
Sea to Monterey Bay), Arctic, and North Atlantic oceans.
stage is unknown for this species. Very little seems to be
about its biology.
and Mills, 1998
General Notes and
abundances, unusual behaviors:
can be seen in this closeup.
Authors and Editors of Page:
Dave Cowles (2010): Created original page
CSS coding for page developed by Jonathan Cowles (2007)
Rosario Invertebrates web site provided courtesy of Walla