Would Like Second Opinion On Snail Id: I Believe Canas Apple

[simonero]

I was given an ID for my snails.  Golden or Florida Apple Snails (I had 2 types. That changed, tank shifting, though my resource didn't agree.  But months later I feel confident they are literally my big lady's spawn.)  Anyways, I disagree with both.  I think this is a pomacea canaliculata.  If I am wrong, I'd greatly appreciate any opinions on the correct ID of my snail.  (Also, if anybody is particularly knowledgeable about apple snails and has a moment, I'd love to run a couple simple questions by you that I'm dying to clear up!!!)
 
Feeding habits: voracious.  Has eaten potato leaves, spinach, lettuce, brocolli, spirulina, frozen krill, turkey sandwich meat (not my doing!), lily stems, carrots, etc...  the only thing it hasn't destroyed is java moss.  It eats it but leaves the "skeleton".  Unexpected really.  But hands down - it is a conveyor belt.
 
Egg sacs: reddish.
 
Here is a photo of my largest snail.  The one very different photo is a full year later - she was in a high-light aquarium for a while and grew some algae on her shell that I don't know how to remove or if I should.  Also, it's difficult to tell, but since the earliest photo (bottom right) vs the recent photo (top left) she has grown a bit in size, and laid several egg masses too.
 
Thoughts?  Agreement?  Disagreement?  General knowledge to share?  

 

 

[simonero]

Can't help myself... just one more photo 

 

 

[Ch4rlie]

First picture does not work for me

 

[simonero]

first picture: http/imagizer.imageshack.us/a/img633/9594/DNjzcr.jpg
 
second: http/imagizer.imageshack.us/a/img674/7782/VbrVbs.jpg
 
Better?  =)

 

[Ch4rlie]

Yep, works now
 
Wow, great snail pics

 

[simonero]

Thanks!  Any opinion on the ID???  I hate not knowing what they are!

 

[techen]

I have no idea... cool pics

 

[Essjay]

According to a website on apple snails (am I allowed to post a link?) you need to look where the whorls meet. A golden apple snail (P. diffusa, previously known as brigs) the sides of the whorls are flat and meet the next whorl at an angle of 90o. Canas have rounded sides to the whorls and where they meet the angle is less than 90o. Florida snails, P. paludosa, are more cone shaped and the whorls meet at an almost flat angle.
 
Looking at your photos, based on all that I would say the browny one is a cana. I can't see the whorls in the first (greyish) photo.

 

[simonero]

Definitely < 90.  The first one is the same snail a year later - she was in a window with a lot of light (and therefore algae) for a while.  Thanks!!!!!