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Shark identification question

 
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Beautiful_chaos
Pony Mullet


Joined: 19 Jun 2012
Posts: 53
Location: Flour Bluff

PostPosted: Wed Nov 21, 2012 5:42 pm    Post subject: Shark identification question Reply with quote

Last Sunday my parents and I were surf fishing and caught 7 sharks, from about 29 to 34in. several of them were black tips and the others... Not sure. They didn't have any standout markings. We thought, at first, they might be Atlantic sharp-nose, which we've caught before, but they didn't have spots (which I THINK atlantic sharp-nose sharks are supposed to have, if not I have no idea what we were catching before...) We heard something about spinner sharks being caught recently and they were hitting the top of the water pretty hard. I know for sure they weren't bulls. They were sleeker and had a somewhat pointed nose. We don't catch too many sharks and these small ones are a pain to tell apart... Any idea what they might be? And what are the easiest ways to tell them all apart?
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oyster dog
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Joined: 02 Jun 2006
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PostPosted: Thu Nov 22, 2012 9:13 am    Post subject: Reply with quote

This is a handy shark identification reference for Texas:
http://www.tpwd.state.tx.us/publications/pwdpubs/media/pwd_br_v3400_1162.pdf
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JOHNNYREB
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Joined: 11 Nov 2007
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PostPosted: Thu Nov 22, 2012 4:22 pm    Post subject: Reply with quote

If ya ever have an shark id ?....just ask beachBum ( ThrillinSTX) If it swims...he could probably id it!
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Cifbb1845
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Joined: 01 Nov 2012
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Location: Austin, TX

PostPosted: Thu Nov 22, 2012 4:25 pm    Post subject: Re: Shark identification question Reply with quote

Beautiful_chaos wrote:
Last Sunday my parents and I were surf fishing and caught 7 sharks, from about 29 to 34in. several of them were black tips and the others... Not sure. They didn't have any standout markings. We thought, at first, they might be Atlantic sharp-nose, which we've caught before, but they didn't have spots (which I THINK atlantic sharp-nose sharks are supposed to have, if not I have no idea what we were catching before...) We heard something about spinner sharks being caught recently and they were hitting the top of the water pretty hard. I know for sure they weren't bulls. They were sleeker and had a somewhat pointed nose. We don't catch too many sharks and these small ones are a pain to tell apart... Any idea what they might be? And what are the easiest ways to tell them all apart?


Where abouts were you fishing? Using for bait?
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Beautiful_chaos
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Joined: 19 Jun 2012
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PostPosted: Sun Nov 25, 2012 5:05 pm    Post subject: Reply with quote

Thanks for the site Oyster dog!
And thanks johnnyreb, I'll keep that in mind Smile
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Beautiful_chaos
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PostPosted: Sun Nov 25, 2012 5:10 pm    Post subject: Re: Shark identification question Reply with quote

Cifbb1845 wrote:
Beautiful_chaos wrote:
Last Sunday my parents and I were surf fishing and caught 7 sharks, from about 29 to 34in. several of them were black tips and the others... Not sure. They didn't have any standout markings. We thought, at first, they might be Atlantic sharp-nose, which we've caught before, but they didn't have spots (which I THINK atlantic sharp-nose sharks are supposed to have, if not I have no idea what we were catching before...) We heard something about spinner sharks being caught recently and they were hitting the top of the water pretty hard. I know for sure they weren't bulls. They were sleeker and had a somewhat pointed nose. We don't catch too many sharks and these small ones are a pain to tell apart... Any idea what they might be? And what are the easiest ways to tell them all apart?


Where abouts were you fishing? Using for bait?



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ThrillinSTX
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Joined: 06 Oct 2008
Posts: 141
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PostPosted: Sun Nov 25, 2012 7:14 pm    Post subject: Reply with quote

Hiya!,

I throw out some sharks species for you.

Atlantic Sharponose, Rhizoprionodon terraenovae



Atlantic sharpnose sharks may have the white spots, but not always. Sometimes the trailing edge of the pectoral fins will be white. The main thing to look at in the second dorsal fin and anal fin alignment. The second dorsal fin is set a bit further back on the body versus the anal fin. Many sharks species, those two fins start at the same place. This is a commonly caught shark.

Finetooth, Carcharhinus isodon



Finetooth sharks have no colored markings on fins. They are often gray with a slight bluish tint. This is a fairly commonly caught shark.

Blacknose, Carcharhinus acronotus



Blacknose shark are another species with no fin markings. They are often grayish color with a hint of yellowish/greenish tint to them. They often, but not alway evident, have a black nose. Hence the common name.



Blacknose sharks are not real commonly caught, but they are there.

Blacktip, Carcharhinus limbatus, and Spinner, Cacharhinus brevipinna.

These are two commonly mistaken species. Many anglers will see this fish jump and spin during a fight. Then they assume they are spinner sharks. Both spinner and blacktip sharks may jump and spin on hit and/or during the fight. They look very similar. The main areas to look at are the anal fin and dorsal fins.

First look at the anal fin. If there is a black tip on the anal fin, it is a spinner shark. If no black tip on anal fin, then its a blacktip shark.

Second, the size of the dorsal fin of the spinner shark is smaller versus the blacktip. If the length of the height of the dorsal fin is 2 times the distance between the 1st and 2nd dorsal fin, then it is a spinner shark. If it is 1.5 times or less, than its a blacktip shark.

Blacktip Shark, notice no black tip on anal fin and size of the 1st dorsal fin.



Spinner shark, notice the size of the 1st dorsal fin.



Spinner shark, notice the black tip on anal fin.



I hope this helps. If I had to guess, some of those sharks you were catching with no markings, may have been finetooth sharks.
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Tyler
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Joined: 06 Mar 2006
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PostPosted: Sun Nov 25, 2012 8:15 pm    Post subject: Reply with quote

Great info, Bum!
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