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Stauroteuthids are peculiar, gelatinous cirrates with a mantle opening that forms a complete tube around the funnel. They also have peculiar gills and internal shells and a large web that is nearly equally developed between all arms. When observed from submersibles, this octopod commonly has its arms and web formed into a bell-shape (bell-shape posture). Sometimes when the octopod is disturbed, it will inflate the web and draw the arms together at their tips to form a "balloon" with the arms and web (balloon posture). These postures are thought to be involved in feeding and/or defense (Vecchione and Young, 1997).
A cirrate with ...
- long cirri and secondary webs.
- U-shaped shell.
- tubular anterior mantle.