Betta Look Alike Or A Blue Fish

[nakomis90]

ok guys i need a hand i have a friend who wants a fish looks like a betta but has to be blue and go in with angel fish and guppies and in the future a shark!
anybody?

 

[indigoj]

not bright blue and doesn't look much like a betta but what about some of the larger rainbowfish?

 

[doubledee]

Moonlight Gourami (gets quite large though):

Dwarf Gourami:

As the above poster says, some of the Rainbowfish are a nice blue colour e.g. Bleher's , Dwarf Neon, Boesmani, Blue etc. Link1 & Link2

 

[luque]

Paradise fish, but heard they can get aggressive