Any ideas on ID? Pelagic species from 2000 NOAA trawl

OB

Colossal Squid
Staff member
Moderator
Joined
Oct 19, 2003
Messages
3,086
#1
This one from the Bering Sea has been puzzling me for some time...

"Scientists are uncertain of the specific identity of this rarely caught pelagic Octopod. The yellow ring occurs only in females and is thought to be commonly eaten by Dalls' Porpoise. They are rarely ever caught in standard survey trawls."
 

tonmo

Titanites
Staff member
Webmaster
Joined
May 30, 2000
Messages
9,366
Location
Pennsylvania
#2

Clem

Architeuthis
Supporter
Joined
Apr 6, 2003
Messages
1,839
#3
Function of the yellow ring presumably related to mating and/or the brooding cycle, however Blaauw conjectures that the ring allows the octopus to play both 45s and standard LPs.
:heee:
 

cuttlegirl

Colossal Squid
Registered
Joined
Sep 16, 2005
Messages
4,934
Location
Pittsburgh, PA
#4
I found a reference to the family Bolitaenidae.
http://www.environment.gov.au/cgi-bin/abrs/fauna/details.pl?pstrVol=CEPHALOPODA;pstrTaxa=64;pstrChecklistMode=2

The pelagic octopods of this family have gelatinous bodies, with arms shorter than the mantle. The arms are equipped with a single row of suckers and are connected by a web of moderate depth. The mantle is oval with the aperture wide. Adult females have a luminous organ in the form of a thick ring under the integument around the mouth. The radula is comb-like. Males lack a hectocotylus.
Will search some more...

Here you go - http://tolweb.org/Bolitaenidae/20193

Your photo looks like Japetella diaphana
 

OB

Colossal Squid
Staff member
Moderator
Joined
Oct 19, 2003
Messages
3,086
#6
Hear, hear!!!! Japetella diaphana

PS: Adam, that is SO funny :biggrin2:
 

Steve O'Shea

TONMO Supporter
Supporter
Joined
Nov 19, 2002
Messages
4,668
#7
I've never seen such a large one! Most peculiar indeed (we get the pelagic juveniles here (NZ), but they're certanly not common).
 

main_board

Vampyroteuthis
Supporter
Joined
Feb 5, 2003
Messages
373
#8
The ID seems to be definitive. Good job cuttlegirl! I was thinking the same thing as Steve, though. TolWeb says they're small octopods, with the largest specimen being 85 mm ML. Now it's difficult to get much in that image for a size reference, but I was thinking that that orange thing top right was a glove of some sort. That would make this a considerably bigger specimen. But I'm not really sure.
Thanks for posting this. Its a really cool species that I hadn't a clue about!

Cheers!
 

OB

Colossal Squid
Staff member
Moderator
Joined
Oct 19, 2003
Messages
3,086
#9
The arms in the specimen held in the pic above appear to be around 150 mm or so and tolweb states that the arms are "considerably shorter" than the mantle; a fact collaborated by the photographs of young specimens included in the entry. Now if a 150 mm + mantle would be hiding underneath the arms in the palm of that gloved hand, I'd be surprised. I'd be a lot less surprised if it turned out that the arm mantle ratio changes over time, with the arms getting longer towards maturity. This appears to be the case in many cephalopods, so why not this one?
 

OB

Colossal Squid
Staff member
Moderator
Joined
Oct 19, 2003
Messages
3,086
#11
And the kitchen sink...
 

Members online

Forum statistics

Threads
19,321
Messages
201,686
Members
8,251
Latest member
Pulpito

Monty Awards

TONMOCON IV (2011): Terri
TONMOCON V (2013): Jean
TONMOCON VI (2015): Taollan
TONMOCON VII (2018): ekocak

About the Monty Awards
Top