Is there any non aggressive or semi aggressive species of betta

[Aniket]

Is there any species of betta which can kept with other big tail fishes?

 

[Valerie Adams]

What do you mean by big tail fish?

 

[Aniket]

What do you mean by big tail fish?

Like fancy guppies, dwarf gourami, betta splendens etc etc

 

[Valerie Adams]

Not really a specific species, more of a specific fish's temperament. Really just trial and error

 

[Colin_T]

There are heaps of Betta species and lots of them are peaceful. See following link.
http://www.fishbase.org/identification/SpeciesList.php?genus=Betta

But you only keep 1 species of Betta per tank and you do not keep Bettas and gouramis together.