Pleco, Common BradleyR

Photo: 

Species:

Location: 
Everglades, FL

Comments

Kenman's picture

Looks like a Vermiculated sailfin catfish

Kenman

BradleyR's picture

I have it IDd as P. pardalis, which Fishbase lists as "Amazon Sailfin Catfish" and Roughfish lists as "Common Pleco", perhaps that should be updated? Is Vermiculated Sailfin Catfish the same species (P. pardalis)? ID was based on belly pattern, seen here on my iNat obesrvation:

https://www.inaturalist.org/observations/19420521

Kenman's picture

Supposebly Florida has 3 established plecos. The vermiculated, suckermouth, and orinoco. We could have the amazon sailfin (P. pardalis), but never really heard about it. Usually the orinoco (P. multiradiatus) is identifyed for having the spots under the belly. So maybe a Orinoco? But still can be a Vermiculated. I think the name “Common pleco” is suppose to be a name to refer to all the florida plecos.

Kenman

uconn fishhead's picture

Good idea to include the ventral pics on Roughfish.  On INaturalist they show the 'vermiculated' pattern of the Vermiculated Sailfin vs. the spotted pattern of the Amazon (P. paradis)

uconn fishhead's picture

I looked further.  According to Fishes of Florida (Robbins et al.) there are 4 established 'Pleco' species:  Hypostomus plecostomus (which only has 8 dorsal rays and should be the only one referred to as Pleco) and the 3 Sailfin catfishes (Vermiculated, Amazon and Orinoco). The Amazon and Orinoco are supposed to have a spotted underbelly and the Vermiculated's is, well, vermiculated.

Bradley's fish is kind of inbetween Amazon and Vermiculated (certainly not a Common Pleco).  Note the variation in underbellies between these species found in this paper:

https://www.researchgate.net/figure/Variations-in-ventral-spots-of-the-exotic-sailfin-catfish-Photo-A-Native-individual-of_fig1_249994154

To make our lives more interesting, Robbins et al. say the Sailfins readily hybridize.  Another example of what happens when you dump closely related tropical species together into the Florida blender.

 

BradleyR's picture

Looking at the pictures you provided, it looks like one of the intergrades to me, which they probably all are in Florida. But it does look "closer" to the spotted pattern around C-E than the true vermiculated paterns further down. In terms of callling it "Common Pleco" here on Roughfish, that's just because the site has that common name listed as P. pardalis.

uconn fishhead's picture

I can't even find the "Common Pleco" (or "Suckermouth Catfish", Hypostomus plecostomus) on Roughfish.  You'll note that if you search "Pleco, Common" under species and select the link under P. paradis, it goes to the USGS site for H. plecotostomus.  I'll message Corey.

Anyway, for Roughfish if you think it's a hybrid, you can call it either species...

BradleyR's picture

Thank you for updating Corey :) I'll stick with pardalis here for now, and leave it as the genus on iNat (I would write out the genus name but it's way too complicated lol). I sent Mr. Robins an email so looking forward to hearing back from him.