Well, the answer is very easy... Yes, it can! The next question will be: Is it wise to let a betta join in? The simple answer will be : No! But is it wise to keep guppies and shrimps together? The answer will be: It depends on wether those guppies will leave those shrimp alone or not. For there are guppies that do but also guppies that won't harras those shrimps.
