You can omit it but It depends on the context. Be careful.
For example, if someone asks you "What animal can be a connection between human and spirit?"
you can say the sentence by omitting ได้.
But if the asker wants to know what a black cat can do, in this case, you should say ได้ because it refers to an ability.
For example, ฉันว่ายน้ำได้ ฉันทำอาหารไทยได้