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 Post subject: Shark ID - Spinners and Blacktips
PostPosted: Fri Jan 20, 2012 11:58 am 
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KING MACKEREL
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Joined: Sat Apr 08, 2006 7:57 pm
Posts: 582
Location: Juno Beach, FL
I know many people think blacktips are spinners and 99% of the time they are blacktips. Spinner sharks are much rarer to catch than blacktips. The first photo is a spinner shark and the second is a blacktip. Take some time and notice the difference between the two.

PLEASE LOOK CLOSELY AT THESE PHOTOS:

Spinner Shark:
- black spot on anal fin
- dorsal fin behind pectoral fins
- smaller dorsal fin

Image

Blacktip Shark:
- white anal fin
- the dorsal fin is closer to the pectoral fins
- larger dorsal fin

Image

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 Post subject: Re: Shark ID - Spinners and Blacktips
PostPosted: Fri Jan 20, 2012 12:11 pm 
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KING MACKEREL
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Joined: Thu Jan 19, 2006 6:05 pm
Posts: 578
Location: Juno Beach, FL / New England
True dat. Informative post. I've only caught a few SPs and witnessed about the same. Comparatively rare indeed to BTs. As long as we're on the info mode, they don't piss thru their skin either. Lol.

8)


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 Post subject: Re: Shark ID - Spinners and Blacktips
PostPosted: Wed Feb 15, 2012 2:40 pm 
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Old Salt

Joined: Sun Apr 29, 2007 4:26 pm
Posts: 387
Location: Albany, Georgia
Thanks BT!!!!!!!!!! Black tips dont have much of....a black tip it seems!

Jay

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 Post subject: Re: Shark ID - Spinners and Blacktips
PostPosted: Wed Feb 15, 2012 3:37 pm 
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BLACK FIN TUNA
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Joined: Tue Jul 18, 2006 10:17 pm
Posts: 3595
Location: South Florida
salvadorsanchez wrote:
Thanks BT!!!!!!!!!! Black tips dont have much of....a black tip it seems!

Jay



That's because the shark on the bottom could be a fine tooth shark, which is very often confused with a blacktip and a spinner shark. Only way to know is to see the teeth.

The blacktip marks under the fins are the ones that are clearly visible on most blacktips and fine tooth sharks.

Here is the info from the Florida Museum of Natural History website:

Blacktip sharks:
http://www.flmnh.ufl.edu/fish/gallery/d ... shark.html

Quote:
The black tips found on the pectoral fins, first and second dorsals, pelvic fins, and lower caudal lobe are very apparent, though they tend to fade with age. The blacktip does not usually have black tips on its anal fin. The similar-looking spinner shark (Carcharhinus brevipinna) does usually develop a black tip on its anal fin several months after birth.



Fine Tooth shark:
http://www.flmnh.ufl.edu/fish/Gallery/D ... shark.html

Quote:
The blacktip shark (C. limbatus) and spinner shark (C. brevipinna) are often confused with the finetooth shark
© George Burgess


Just adding $0.02


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