Photo 5963, (c) Ken-ichi Ueda, some rights reserved (CC BY-NC-SA)

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Attribution © Ken-ichi Ueda
Cc by nc sa small some rights reserved
Uploaded by kueda kueda
Source Flickr
Original http://www.flickr.com/photos/18024068@N00/4007914560
Associated observations

Photos / Sounds

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What

Rabbit-ear Barnacle Conchoderma auritum

Observer

kueda

Date

October 11, 2009 01:10 PM PDT

Description

This a close-up of the chin of a humpback whale. Conchoderma auritum are the elongate creatures that don't look like barnacles (but are). They actually grow on the other barnacle, Coronula diadema.

Photos / Sounds

Observer

kueda

Date

October 11, 2009 01:10 PM PDT

Description

Are these Coronula diadema and Conchoderma auritum? I hardly know anything about barnacles, but the ones shown here certainly resemble those two species. I just don't know if there are other possibilities given the context. The Coronula (the ones that look like "normal" barnacles) were about 10 cm in diameter, I think, though it was kind of hard to tell, since they were on the chin of a living humpback whale. Observed near the Farallon Islands, ~60 km west of San Francisco, CA, USA.

Also, I've read that Conchoderma is merely a commensal epibiont on Coronula, but it really looks like it's bursting out of the inside of some of these barnacles, which seems somewhat less than harmless. Is this just a weird angle, or is Conchoderma also a parasite?

Later..
FYI, the above was mostly written back in 2009 when I took these photos. There's lots more info and research in the comments at https://www.flickr.com/photos/ken-ichi/4007914560/

Associated taxa
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