Predatory fish IDs, questions

[Caveden]

1. Are those amartus or tatauaias?

2. Black wolf in the second pic if I’m not wrong, what size would they usually reach? Thank you

 

[Krismo962]

DB junkie

 

[WOLF2013]

I may be wrong but..
1.) Armatus
2.) yes black wolf

 

[DB junkie]

Adipose fin on the Hydros confirms them to be Armatus.

Black Wolves I believe usually top out around a foot and a half....

 

[Caveden]

I heard black wolves comm well with bichirs. Any luck with arowana however?

 

[DB junkie]

I heard black wolves comm well with bichirs. Any luck with arowana however?

I wouldn't listen to much of the here say involved with wolves unless its from people with direct experience. You could have a fish that tries to tear the owners hand off passed to another keeper who may house it peacefully in a community setting......

When I was keeping them it sure seemed to me like they could be kept with about anything not considered food..... Aimara included.

 

[FJB]

Adipose fin on the Hydros confirms them to be Armatus.

Black Wolves I believe usually top out around a foot and a half....

Both armatus and tatauaia (all Hydrolycus) will have an adipose fin. That is no character for discerning among them.

 

[krichardson]

Both armatus and tatauaia (all Hydrolycus) will have an adipose fin. That is no character for discerning among them.

....and not only that all characins have that fin But DB was referring to the color of the adipose fin,which on armatus it is almost always a bright reddish color as opposed to the tats who's adipose fins are not so brightly colored.

 

[Caveden]

From the seller, I’m thinking it could work? Not saying I would, just another option in mind. Are their scales (wolffish) tough?

 

[koltsixx]

As DB junkie and Krichardson said the adipose is one of the ways to distinguish an Armatus from a Tatauaia which is probably the next most commonly imported Payara next to Armatus, not that either are common. We have an ID thread hat points out many of the differences between the different Payara. One quote from the thread exemplifies what Krichardson and DB junkie are referring to "The key to IDing an Armatus vs. tat is the adipose fin. That is it. The adipose of the Armatus is orange. A tats adipose fin can also be orange BUT it will MATCH the color the tats caudal fin. In other words, if the adipose fin contrasts highly with the color of the caudal fin, it is an Armatus." Quoting JD7.62,

I myself have always found the Body and Caudal fin to be the most distinguishing characteristics between the two. Which is also mentioned in the Payara sticky here. Armatus are much fuller bodied throughout while Tats thin more sharply and tapers more toward the caudal fin then the Armatus. Also the caudal of fin of the Armatus darkens as it nears it's end but the very edge of the caudal fin is edged in white. The caudal fin in the Armatus also ends in more definite points while the Tat's caudal fin is rounded. Some pics from the sticky for reference the first/upper pic is an Armatus, the second/lower pic a Tatauaia