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Gastromyzon ctenocephalus? Maybe?


ArtemisCai
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I got a better look at my new mystery loach in the quarantine tank and I think it is possibly Gastromyzon ctenocephalus. It matches the description and photos on this site https://www.loaches.com/species-index/gastromyzon-ctenocephalus

I may be way off because I'm a Noob Nerm, but all signs seem to be pointing to this being the one. Any thoughts?

Story of how I got him/her is in my other post :

https://forum.aquariumcoop.com/topic/15305-frustrating-experience-ordering-fish-online/page/2/?tab=comments#comment-126781

He is really small slightly over an inch, so I am guessing he is young.

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I think he might look more like gastromyzon stellatus personally. They are very similar but if you look at pictures on seriously fish and loaches.com the pattern on the caudal and dorsal fin looks more like stellatus than ctenocephalus to me. Apparently the pattern/dots on the skin on stellatus vary between individuals quite a bit as well. 

I suspect they are wild caught on mass as a lot of species live alongside each other and then they are sold as generic hillstream loaches or Borneo suckers or whatever and probably aren't even separated let alone labelled as individual species so it's hard to know for sure. 

gastromyzon-stellatus-b.jpg.5e67da5245fd52140bbaa6521095a5fa.jpg

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I was making my assumption off of the information on loaches.com

https://www.loaches.com/species-index/gastromyzon-ctenocephalus

I do see what you are saying. Especially about his dorsal fin. I was just thinking that maybe because he is still so young, the color has not shown up on his dorsal fin yet. Is that possible? I'm a noob, what do I know. lol

It was particularly this section where it mentions the tail markings:

"The dorsal fin has bold pale blue markings, and the caudal fin has bold horizontal pale blue stripes with black lines between them. The caudal pattern in G. scitulus has vertical breaks in the horizontal pattern, and the dorsal is normally lacking any blue spotting."

Roomba's tail looks a lot like the picture and the description of Gastromyzon ctenocephalus. His tail has solid lines, without breaks. Also, you can't really tell from the photos, but in the tank they look pale blue.

Is it possible he could be a half breed? Does that even happen?

Gastromyzon ctenocephalus vs. G. scitulus .PNG

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On 8/22/2021 at 10:56 AM, ArtemisCai said:

I was making my assumption off of the information on loaches.com

https://www.loaches.com/species-index/gastromyzon-ctenocephalus

I do see what you are saying. Especially about his dorsal fin. I was just thinking that maybe because he is still so young, the color has not shown up on his dorsal fin yet. Is that possible? I'm a noob, what do I know. lol

It was particularly this section where it mentions the tail markings:

"The dorsal fin has bold pale blue markings, and the caudal fin has bold horizontal pale blue stripes with black lines between them. The caudal pattern in G. scitulus has vertical breaks in the horizontal pattern, and the dorsal is normally lacking any blue spotting."

Roomba's tail looks a lot like the picture and the description of Gastromyzon ctenocephalus. His tail has solid lines, without breaks. Also, you can't really tell from the photos, but in the tank they look pale blue.

Is it possible he could be a half breed? Does that even happen?

Gastromyzon ctenocephalus vs. G. scitulus .PNG

No idea noob too! I was just looking at pictures, do they have a description for stellatus as well? He looks like he has the caudal fin of the ctenocephalus but the dorsal of scitulus lol but the stellatus seems to be that way from the pics so that's why that's my guess. 

Like you say probably be easier when fully grown! Also I think they are generally different sizes when fully grown so that might help

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