Umbrella Slug

I was thinking this was a fissurelid, but check out the shell. It has a little peak, almost a hook like Crepidula. Pretty chunky, maybe 4-5 cm in this pic. Turns out its something totally different: http://www.seaslugforum.net/find/umbrumbr. ID'd with nudipixel: http://www.nudipixel.net/species/umbraculum_umbraculum/2/

An Umbrella Slug (Umbraculum umbraculum)

A very variable species likely to be found where there are Demospongia spp. on which it feeds.

OLYMPUS DIGITAL CAMERA

Umbraculum umbraculum (Lightfoot, 1786)

Summary[edit] Description: English: Exhibit in the Finnish Museum of Natural History, Helsinki, Finland. Photography was permitted in the museum without restriction. Date: 16 August 2012, 03:27:02. Source: Own work. Author: Daderot. Permission(Reusing this file): : This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse.

Umbraculum umbraculum (Lightfoot, 1786)

Summary[edit] Description: Français : Une ombrelle (Umbraculum umbraculum) à la Réunion. Date: 9 November 2014, 20:42:03. Source: The uploader on Wikimedia Commons received this from the author/copyright holder. Author: Sébastien Vasquez. Permission(Reusing this file): : This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page. The Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by an Volunteer Response Team (VRT) member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2018040810002013. If you have questions about the archived correspondence, please use the OTRS noticeboard. Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2018040810002013.

Summary[edit] Description: Español: Umbraculum umbraculum (Lightfoot, 1786) (Sombrero Chino), Carupano estado Sucre - Venezuela. Date: 30 November 2011. Source: Own work. Author: Veronidae.

Umbraculum umbraculum (Lightfoot, 1786)

Summary[edit] Description: Bronte Pool, Sydney, NSW diet: sponges size: up to 14 cm, on the image: 10cm discovered: 1786, Lightfoot. Date: 9 March 2015, 19:14. Source: Umbrella slug-Umbraculum umbraculum. Author: Sylke Rohrlach from Sydney. Camera location33° 54′ 16.16″ S, 151° 16′ 06.94″ E View all coordinates using: OpenStreetMap-33.904489; 151.268595.

Summary[edit] Description: Español: Umbraculum umbraculum, a 17 m, Parque Marino de Izu, Japón. Date: 23 January 2005, 14:14:31. Source: http://www.izuzuki.com/Zukan/Slug/hushiera/hitoeKI.html. Author: Izuzuki Diver.

Summary[edit] Description: Bronte Pool, Sydney, NSW diet: sponges size: up to 14 cm, on the image: 10cm discovered: 1786, Lightfoot. Date: 11 March 2015, 19:06. Source: Umbrella slug-Umbraculum umbraculum. Author: Sylke Rohrlach from Sydney. Camera location33° 54′ 16.16″ S, 151° 16′ 06.94″ E View all coordinates using: OpenStreetMap-33.904489; 151.268595.

Umbraculum umbraculum (Lightfoot, 1786)

Umbraculum umbraculum (Lightfoot, 1786)