Image: Samsonfish at the Wreck of the HMAS Swan

Samsonfish at the Wreck of the HMAS Swan

A Samsonfish at a depth of 20 m, Wreck of the "HMAS Swan", Geographe Bay , Western Australia, April 2006.

Photographer:
Erik Schlögl
Rights:
© Erik Schlögl

Last Updated:

Tags fishes, ichthyology, Seriola hippos, Carangidae, Samsonfish,

3 comments

Mark McGrouther - 12.05 PM, 11 May 2010

Hi Alex,  Dr Bill Smith-Vaniz, a carangid expert has confirmed my original identification of the fish as a Samsonfish.  He wrote: I could not see the detail of the upper jaw adequately in the photograph.  However, the profile of the head appeared much more rounded than is typical for either Seriola dumerili or S. rivoliana; also in life both of these species typically have a dark diagonial band through the eye that extends to the origin of first dorsal fin (lacking in S. hippos).  I searched images of Greater amberjack (S. dumerili) using Google and am convinced that your identification of the lower photograph as S. hippos is correct.  Other characters that readily distinguish S. hippos from S. dumerili are the number of soft rays in the dorsal and anal fins: 22-25 and 15-17, respectively in S. hippos versus 29-35 and 18-22 in S. dumerili.

Mark McGrouther - 10.05 AM, 10 May 2010

Hi Alex,  Thank you for your comment.  Identifying trevallies is not always easy, especially from underwater photographs.  I have added to the fact sheet for the Samsonfish some information on how to distinguish the four species of Seriola that are known from Australia. The other problem is that the common name 'Amberjack' has been applied to more than one species.  I have emailed one of the world trevally authorities and asked him to look at the image for us.  I will let you know what he says.

fisherman - 8.05 PM, 07 May 2010
That's actually and Amberjack

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