Thank you for your help.
But it isn’t fish lice or something.It is definitely part of the body.I know male’s white one is gonopodium and I personally think female’s transparent one is ovipositor.

I know the male have gonopodium, but I noticed the female also have something under the vent.
As far as I know, Hoplosternum littorale and Callichthys Callichthys female have it.
What is this?

I was thinkng this might be other species of callichthys before question.
I’m glad to know the most possible is female callichthys callichthys.

Thank you all.

Head pattern is also differnt from common callichtys callichtys.
Picture above is this one.
Picture below is common one.
Both locality are same.Some specimen were imported from same locality and only this one is strange.

Is there a possibility that a different species of Callichthys was imported ...

Please see.

From Nanay river in Peru.

I bought it as “ Callichthys callichthys” but I feel strange in its body.

Individuals like the one pictured above is sold as “full spot royal pleco” and individuals like the one pictured below is sold as“half spot royal pleco” in Japan.Both are from Columbia.

Are they same l330?
Which type is original?
What makes such difference?

I'm sorry to bother you over and over.

Thanks.

from Colombia.
Sorry to bother you again.

Thank you very much.

Thank you. I’m excited to get such a rare fish.

from Turiaçu River in Brazil.

I see.Thank you.

Their color look different to me. Is this like a individual difference?

I really trust you.But your answer is so simple that I’m still a bit worried haha.

Thanks!
Sorry, but I want you to see another one.This is twice the size. Is this same spiecies too?

I’ve seen your youtube! Is this fish same species as the ones you introduced on youtube recently?

Actually,this fish is now on sale as “ candiru sp” in a shop in Japan . I’m wondering whether to buy this. But if you can conclude this as “cetopsis candiru”,I’ll buy this.

I want to know if this fish is .

They are sold as Platystacus cotylephorus.But the one in the front looks to me like different specie.Are they really same species?

Please check new pictures.

Thank you for your help. I’m now sure that upper one is electricus.I’ll post new pictures of the others later.

All I know about upper one is they came to my country via Dutch.

Upper one’s location is unknown. The others are from Nigeria.

I think they are electricus. But Shopper said that they were “sp” and can’t be concluded as “electricus”. So I need your help!

I want to know if they’re Malapterurus electricus.