Chromodoris cf. colemani
Known from Malaysia and Indonesia
Sipadan, Malaysia, May 1992.
This species has similarities to Chromodoris colemani but in that species there are usually 5 black lines on the mantle. It may be a colour form.Authorship details
Rudman, W.B., 1998 (September 10) Chromodoris cf. colemani [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/chrcfcol
May 5, 2010
From: Deepak Apte
Concerning message #22337:
Is this animal Chromodoris hamiltoni?
Locality: Andaman, 10m, India, Bay of Bengal, 8 April 2009, Coral reef. Length: 23mm. Photographer: Vardhan Patankar.
firstname.lastname@example.orgApte, D.A., 2010 (May 5) Chromodoris hamiltoni ? from India. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23138
No this is not C. hamiltoni. It is a species which is characterised by its orange background colour and black lines edged in white. At present I am calling it 'Chromodoris cf colemani' but there are probably two or even three 'species' clustered together under that name. Until we get more material for comparison I am not sure if these are all varieties of one new species or perhaps variations of existing species.
October 31, 2006
From: Kenneth Yong
Locality: Batu Kucing Reef, Lang Tengah Island, 15 m, Malaysia, South China Sea, 27 July 2006, Fringing coral reef. Length: 5 - 6 cm. Photographer: Kenneth Yong.
Is this a color form of Chromodoris magnifica? Thanks much for the help.
email@example.comYong, K., 2006 (Oct 31) Color form of Chromodoris magnifica?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/17659
This is the same as Aw Seng Meng's animal [#4616 ], also from Malaysia which I have placed on a temporary Chromodoris cf colemani page, not because I think it is C. colemani, but as a covenient way of referencing it because of its colour pattern.
February 16, 2003
From: Erwin Koehler
is this what you call Chromodoris cf. africana?
It is from the Philippines, Cebu Island, Moalboal,
divesite "Kasay Wall".
date: 13 March 2002
I think this is what I am calling Chromodoris cf. colemani. I have added red lines alongside pointing to translucent bands on the mantle which are sometimes orange brown. Looking back at an earlier photo which you sent from the Philippines, and I thought was probably a juvenile Chromodoris cf. africana, is possibly Chromodoris cf. colemani. I think I can see traces of these translucent lines - but I can't be 100% sure.
December 16, 2002
From: Erwin Koehler
Bob Bolland reports it from Okinawa - have a look at http://rfbolland.com/okislugs/chrohami.html
I think this is pretty far away from Tanzania...
firstname.lastname@example.orgKoehler, E., 2002 (Dec 16) Re: Chromodoris hamiltoni from Pemba. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/8446
Bob's animal is what I am calling Chromodoris cf. colemani, It differs from C. hamiltoni in the number of longitudinal lines and in the orange border which is probably best described as submarginal. See Bernard Picton's earlier discussion on this. - Another lose end I'm afraid, but not as loose as a population of C. hamiltoni in the central Pacific.
October 11, 2002
From: Marli Wakeling
Location: Batu merah, Lembeh Straight, Sulawesi, Indonesia
Date: July 2002
Depth: 40 feet
Length: 2.5 cm.
Photographs: Marli Wakeling
Wakeling, M., 2002 (Oct 11) Chromodoris cf. colemani from North Sulawesi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/8125
This is the 'form' I am calling Chromodoris cf. colemani at present. An interesting thing about your photos is the sponge your slug is on. It could be a species of Aplysilla or Dysidea, so it is worth noting as a possible food. Certainly worth looking out for a possible association in the future.
July 7, 2001
From: Bernard Picton
I'm still puzzling over this, I'm now convinced that there is a species which is widespread East Africa to Indonesia, Okinawa? (Bob Bolland's site as C. hamiltoni?) which is not true Chromodoris hamiltoni and which grades into (is) your Chromodoris cf. colemani. I've attached three more pictures to add to the three I sent yesterday which come closer to C. hamiltoni. They differ in my opinion in having a punctate blue background (more solid in C. hamiltoni) bolder black lines without blurred edges, black lines partly replaced with brown pigment or with intermediate brown lines. There is a moderately broad white band between the black lateral lines and the orange border which extends along the sides of the body (wide band at head and tail in C. hamiltoni, but little or no band at sides). The orange border is yellow-orange rather than orange-red in C. hamiltoni.
The three photos were taken in NW Bali, Indonesia in March 1996.
Picton, B., 2001 (Jul 7) More on Chromodoris cf. colemani & C. hamiltoni. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4745
I didn't post this message yesterday as promised, as I was still trying to think of something enlightening to say. Words of wisdom still escape me, so I'll post your message without them.
As I said before, I am not how many species have these orange lines and if there is more than one species, whether orange lines can be present or absent within a single species. I suspect that all your photos in this message and your earlier one are the s ame species. Suffice to say I have over many years built up a dossier of anatomical dissections and radula photos of this colour group but still can't find convincing differences. I assume mimicry is probably involved, greatly complicating the situation. And if mimicry is involved in only one part of the geographic range, it is possible that there are a number of species which only resemble each other in regions of geographic overlap.
July 5, 2001
From: Bernard Picton
I photographed these Chromodorids in the Philippines in 1983, in fact I had 7 specimens of this type. They seem to fit your Chromodoris cf. colemani exactly. I didn't find any typical Chromodoris colemani with the five black lines, just this type with the three black lines and two brown lines on the mantle. The brown line seems to abruptly change to black sometimes near the gills - often only on one side of the animal.
BEPPH2 - Mactan Is., Cebu - 25 MAR 1983
BEPPH28 - Mactan Is., Cebu - 26 MAR 1983
BEPPH79 - Dumaguete, Negros - 30 MAR 1983
Picton, B. , 2001 (Jul 5) Chromodoris cf. colemani from Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4746
I'll wait until I post the rest of your photos of 'Chromodoris cf. colemani' up, hopefully tomorrow.
June 27, 2001
From: Aw Seng Meng
Dear Dr. Rudman,
Could you please ID this nudibranch; it may be just a colour variant of a common Chromodoris but I cannot find any similiar picture in my books.
This branch was photographed last month on Kapas Island, an island off the East Coast of Peninsular Malaysia. It was about 2.5cm long, in 8 metres of water in the afternoon, on broken hard coral.
Aw Seng Meng
email@example.comAw Seng, M., 2001 (Jun 27) Chromodoris cf. colemani from Malaysia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4616
I think this is probably an orange form of Chromodoris colemani. At the moment I am storng a group of puzzling animals with orange in their colour patterns on this Chromodoris cf. colemani page. I suspect they are not all the same species but they are easier to find here than if I numbered them individually as unknown species. As you will see a number come from Malaysia and nearby waters. There are some interesting 'species' or apparent 'color forms' of more widespread species, appearing from Thailand and Malaysia, so any other intersting photos you would like to share with us would be very welcome. They would help build up our knowledge of the distribution and colour variation of these intersting animals.
September 10, 1998
From: Aloysia Murni Shintosari
I have no idea about this because I cannot find any picture that look like these picture. Is it possibly that this is a variation? Because when I compare the pictures of Chromodorididae, there are many species that look similar to one another.
They are from the reef at Penjaliran Barat Island, Thousand Islands, Indonesia.
Thankyou for any advice
Aloysia Murni Shintosari
Museum Zoologicum Bogoriense
firstname.lastname@example.orgAloysia Murni Shintosari, 1998 (Sep 10) Chromodoris colemani?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/234
I am not quite sure whether this is a colour form of Chromodoris colemani or a distinct species. I have specimens from Malaysia as well. .. Bill Rudman.