Does basa have omega 3

Yes, but less than traditional 'white fish' (Cod, Haddock) and far lower than 'oily fish' (Sardines, Salmon).

Omega-3 in 100g of cooked fish:
Basa 60 - 80mg
Cod 300 - 450mg
Salmon 2300 - 3400mg

Amounts of Omega-3 vary depending on the source and preservation / cooking methods used.