Showing posts with label Pigeye Sharks. Show all posts
Showing posts with label Pigeye Sharks. Show all posts

Friday, September 05, 2014

Shark ID - Help wanted!

These are Bulls Sharks - click for detail!

Check this out!

What are those Sharks among those Grey Reefies?
Methinks Dusky/Galapagos (but possibly Bronzie?) and.... Pigeye (!!!) - the latter because she doesn't feel like a Bull, and because I read that from C. amboinensis, the bull shark differs in its lower, less erect first dorsal fin and higher, more erect second dorsal fin. The ratio of first:second dorsal height is 3:1 or less in C. leucas, but over 3:1 in C. amboinensis.

Opinions please!
JSD - David?



Friday, January 02, 2009

Bull Sharks in Thailand!


Ever heard of Chumphon Pinnacle?

Me neither, until a very pink website announced that it was Thailand's new hotspot for Bull Sharks.

I must admit that at first glance, I was rather skeptical.
The first pics showed smallish Sharks with a very distinct dark rim to their tail fin, something that I had never seen in Fiji. Bull Sharks have a closely allied species, the Java or Pigeye Shark (Carcharhinus amboinensis) and my gut feeling was that it could be that species, which would have been a great find in its own right.

As more and more images began populating the site, I however started seeing Sharks that were very much the same as our own sub-adults. Must be that the "rimmed" Sharks were either smaller than even our smallest animals, or that they were displaying some typical Thai color pattern, not at all impossible per se. We know that from Grey Reefies where local populations have a white rim on the first dorsal fin, prompting some splitters to try and describe them as an own species (which they are not).

Having alerted "our" expert Juerg, he confirms the original diagnosis.
Kudos to DJL (yes: Davy Jones' Locker, of all things...) on Koh Tao for their find and correct identification of the Sharks.

By the way: that would be just down the road from Ko Pha Ngan's Full Moon Party and just around the corner from The Beach - epic!