Haminoea ovalis Pease, 1868 (shell: 7mm)
OPISTHOBRANCH OF THE WEEK
Photo by Atsushi Ono
Opisthobranch of the Week Data
Frequency on Okinawa:
- Order: CEPHALASPIDEA
- Family: Haminoeidae
[brackets indicate range for all Okinawa-collected specimens of the species]
- Individual Collection No: Atsushi Ono #0-580-2
- Location: Zamami Island, Kerama Islands, Okinawa
- Date: 9 May, 2001 [numerous animals seen, but only a single collected animal]
- Depth: 59ft (18m)
- Water temperature at collection depth: ca. 75oF (ca. 24oC)
- Size: Shell 7mm [numerous animals seen, but only a single collected animal]
- Specimen deposited: Kominato Marine Laboratory, Marine Biosystems Research Center, Chiba University, Japan
Haminoea ovalis 1 is considered to be common in the Kerama Islands. I've not personally seen this attractive little haminoeid here in the waters of Okinawa's main island, but Atsushi Ono mentions (pers. comm.) seeing in excess of fifty individuals in the Keramas* and considers this animal to be common there. Atsushi found the above featured animal on seaweed found growing upon dead coral in 18m of water. I've added a second page with several
additional images of the Kerama Islands animals, also kindly furnished by Atsushi.
In addition to Atsushi's images from the Keramas, Jun Imamoto (2004) also has images of specimens from both the Keramas and the Amami-Ooshima Islands.
I've previously featured on these pages the following members of the genus from Okinawan waters:
- Imamoto, Jun. 2004. http://www.umiushi.info/photo_species/photo_splist_eng.php?sopt=0&loc=0000
(this is the opening page to Jun's taxonomy list and links to the photos).
* Keramas = the Kerama Islands Group, located 30 ~ 40 kilometers west of the Okinawa capitol, Naha.
Page Date: 20 Dec '04
Page Modification Date: 06 Nov '06
Digitally manipulated photo
Copyright © 2006 Robert F. Bolland