What are these please?

[sparkypenguin]

Dalmatian mollies can change a bit and gain or lose some black. If it's black and white spotty, it's a Dalmatian.

There's no way the shop can tell if the fish is going to change colour unless one of the staff bred the fish and was into line breeding and genetics. And that is unlikely.

The lyretail is an old variety that is found in lots of domestic mollies.

Thanks for that and totally understand.
Is it a Sailfin and should the FS have know this?

 

[itiwhetu]

@itiwhetu
Thanks for your post.
The general consensus is that they are s hybrid of a thick lipped Gourami and that they will probably grow a little bigger than a Honey.
However your post tends to suggest they are not a community fish, where as others have indicated that they are more peaceful than other Gouramis in general.
Does your post refer purely to thick lipped Gouramis or to this actual varient?

I wouldn't keep a group of thicklipped Gouramis in a community tank, but they could work out just fine.

 

[Colin_T]

Is it a Sailfin and should the FS have know this?

It's probably part sailfin molly but not what I would call a true sailfin molly, which can get big and are generally not black or dalmatian.

The shops buy in fish as assorted mollies and get sent whatever they get. They can also buy in black mollies, sailfin mollies, balloon mollies. They should be able to identify these different varieties, but if the fish was in a tank of mollies, most people won't know the difference.