Tritonia nilsodhneri

David Serrano Tritonia nilsodhneri Lastres, Asturias

Manuel Martínez Chacón De estas sí que se ven por Tarifa.

João Pedro Silva Por aqui encontramos muitas variações cromáticas.

David Serrano Jejejeje, pues tendré que ir a bucear por allí, que esa zona la tengo por descubrir aún.

Aqua Soul Orange Flower D300 : 60mm Inon Z240

Chris Spence Nice Orange! Camera settings please.

Eric van Andel I think F around 4 and shutterspeed 1/100....

Aqua Soul Hi Chris I have updated the information on the photo.

Fabio Russo wow slug's hegg!!! impressive!!!

Aqua Soul Well spotted Fabio Russo, these are the eggs from the Whip-fan Nudibranch (Tritonia nilsodhneri) around the tip of a sea fan.

Richard Yorke There was mention on one of the groups about cuckoo wrasse changing sex, which set me looking for a picture. I've now found the picture but can't find the post it was relevant to, but I'll post it here anyway. This is a half way stage with the characteristics of both sexes present. The sharp eyed might also see a Tritonia nilsodhneri on the sea fan in the bottom left corner

Phillip Hyden Certain land animals have been known to change sex but it is only when their environmental conditions are stressed, would this be the same with the wrasse?

Richard Yorke No, in this case it is when a group of females is left without a male for some reason. One of the females then changes to a male to fill the gap.

Richard Yorke http://www.nationalaquarium.ie/index.php?option=com_content&view=article&id=73:cuckoo-wras..

Phillip Hyden Is this behaviour common in marine animals? I knew that cuttlefish males imitate females but didn't know that fish went through that process. (edit) I just read the aquarium write up you posted, that is awesome and a great way for a species to keep a good gene pool, matriarchal dominant female changing to male, could teach us a thing or two.

João Pedro Silva Coris julis do the same.

Chris Wood Sea Fan Survey Results on the NBN The results of the dedicated pink sea fan surveys carried out by Seasearch volunteers since 2001 are now available to view on the National Biodiversity Network (NBN) and you can see the interactive map of the data. The Seasearch NBN data shows records for pink sea fans and also for three other species commonly associated with them. These are the sea fan anemone Ampthianthus dohrnii, the sea fan nudibranch Tritonia nilsodhneri and the sea fan false cowrie, Simnia hiscocki. The distribution of pink sea fans extends from Donegal in Ireland to Wexford, South-West Wales, both coasts of Devon and Cornwall, the Isles of Scilly and the whole of Dorset. The sea fan anemone has a much more restricted distribution, covering the south coasts of Devon and Cornwall and the Isles of Scilly. The sea fan nudibranch is found in most places where pink sea fans occur, though records are very limited in Ireland. Finally the sea fan false cowrie, Simnia hiscocki is a recently identified species and all older records have been made as Simnia patula. All records of this species on the NBN currently come from this new Seasearch dataset. Most are from the south coast of Cornwall, though there are also records from Lundy and South Devon. The dataset also includes personal records of this species made by Keith Hiscock, after whom the species is named. The full dataset also includes information on sea fan colony size, condition and fouling species. This does not show on the NBN but is available for reports. The full dataset also includes records from the Channel Islands. These are not currently displayed on the NBN website but updates are taking place soon whcih allow all of the Seasearch data for the Channel Islands to be made available online. The Seasearch website contains details of what sea fan populations we want to target and you can either download recording forms or submit your data online.

Henrique Nascimento Catarina Tritonia nilsodhneri Sesimbra - Poertugal 20120912

João Pedro Silva A master of camouflage, Tritonia nilsodhneri immitates perfectly the sea fans it feeds on. Sesimbra, Portugal. Canon EOS 350D in Ikelite housing, Canon 100mm macro, 2x Nikonos SB-105 strobes, f/20, 1/200s, ISO 100.

João Pedro Silva Signs of the crisis: Tritonia nilsodhneri evicted. Shot last month in Sesimbra, Portugal, Note: I've seen this species many times but this was the first time I saw it outside a sea fan.

João Pedro Silva Tritonia nilsodhneri Local: Sesimbra, Portugal Spot: Paredes do Cabo Profundidade: 13m Data: 03-08-2012

Oriol Domingo Tritonia nilsodhneri

Carlos Fernández-Cid Ramos Tritonia Nilsodhneri. Galicia. Spain

Frank Krasovec Tritonia sp. - Any idea on specific species? Town Wall, San Salvadore Island, Bahamas, 15Jun13

Jane Doherty Wow! Good spot!

Frank Krasovec Pretty amazing how it blends in with it's host.

João Pedro Silva Very similar to some color variations of Tritonia nilsodhneri with a slender body and feeding on gorgonians but I've never seen records on the W Atlantic. http://www.flickr.com/photos/49844432@N08/6010147178/

Gary Cobb This is Tritonia hamnerorum and in your photo I can make out the fine longitudinal line work of the mantle. This model also comes in white.

Gary Cobb Hi Frank, I am in the final stages of finishing the Western Atlantic Nudibranch ID App and want to know if I may include your photo (orange colour form) with full credit of course. gary@ nudibranch.com.au thank you

Gary Cobb Thank you Frank!