Marionia sp. 2 (95mm)
OPISTHOBRANCH OF THE WEEK
Opisthobranch of the Week Data
Frequency on Okinawa:
- Order: NUDIBRANCHIA
- Suborder: Dendronotina
- Family: Tritoniidae
[brackets indicate range for all Okinawa-collected specimens of the species]
- Individual Collection No: RFB #3039
- Location: Seragaki, Okinawa (26o 30.4'N, 127o 52.6'E) [all five specimens from Seragaki]
- Date: 18 Jul, 1992 [12 Jun '84, 2 Jun '89, 2 Jul '89, 18 Jul '92, 23 May '98]
- Depth: 110ft (34m) [110ft, 120ft, 125ft, 160ft, 160ft]
- Water temperature at collection depth: Not recorded
- Size: TL 95mm [82mm, 90mm, 95mm, 120mm, size not recorded for one indiv.]
- Specimen deposited: California Academy of Sciences
Marionia sp. 2 is considered to be rare on Okinawa; five specimens have been collected during many years of diving here. Hikaru Nakada (2002) has several excellent images of this apparently undescribed animal from Okinawa posted on the Sea Slug Forum (Hikaru's images of a 130mm plus animal are from Maeda-saki, approximately 2km W of the site where the Seragaki animals were collected).
Marionia species are known to prey on xeniid soft corals (Gosliner, et al, 1996), however, Marionia sp. 2 was not found associated with any definitive prey.
I've added a second page with images of ova from the above animal as well as images of the other four collected specimens.
Marionia sp. 2 is one of several undescribed species of Marionia from Okinawan waters. As of mid-January, 2013, I've featured four unknown (undescribed?) species on thses pages. These four are:
- Nakada, H., 2002 (July 5) Marionia sp. from Japan [Message In] Sea Slug Forum. http://seaslugforum.net/find.cfm?id=7353
- Gosliner, T.M., D.W. Behrens, & G.C. Williams. 1996. Coral Reef Animals of the Indo-Pacific. Sea Challengers, Monterey, California.
Page Date: 28 Oct '02
Page Modification Date: 21 Jan '13
Digitally manipulated photo
Copyright © 2013 Robert F. Bolland