dcsimg

Description

provided by iArczoo

The coloration of the manubrium, bulbs, and gonads is yellowish.

license
cc-by-3.0
copyright
Hopcroft, Russ
author
Hopcroft, Russ
compiler
Ershova, Elizaveta
partner site
iArczoo

Diagnostic Description

provided by iArczoo

Gonads are located near the center of the radial canals.

license
cc-by-3.0
copyright
Hopcroft, Russ
author
Hopcroft, Russ
compiler
Ershova, Elizaveta
partner site
iArczoo

Distribution

provided by iArczoo

Cosmopolite. In the Arctic, found in the Barents Sea, Chukchi Sea, and White Sea

license
cc-by-3.0
copyright
Hopcroft, Russ
author
Hopcroft, Russ
compiler
Ershova, Elizaveta
partner site
iArczoo

Life Cycle

provided by iArczoo

Hydroid Obelia geniculata (Hincks)

license
cc-by-3.0
copyright
Hopcroft, Russ
author
Hopcroft, Russ
compiler
Ershova, Elizaveta
partner site
iArczoo

Morphology

provided by iArczoo

Umbrella flat, inner side bulges outward during movement. Approximately 100 tentacles are placed in the same plane as the body. Velum is rudimentary. 8 statocysts, each one with 1 concretion. Gonads are located near the center of the radial canals, are oval in shape; in females usually carry several large eggs. Young specimens have 16-24 tentacles, gonads are usually located near the manubrium.

license
cc-by-3.0
copyright
Hopcroft, Russ
author
Hopcroft, Russ
compiler
Ershova, Elizaveta
partner site
iArczoo

Size

provided by iArczoo

Diameter up to 6 mm.

license
cc-by-3.0
copyright
Hopcroft, Russ
author
Hopcroft, Russ
compiler
Ershova, Elizaveta
partner site
iArczoo