That's not necessarily a knock against the idea: pink/blue/green jellyfish are both enemies and creatures that may be placed decoratively, and the black scorpion is a mini Sand Poacher. It's just that terrarium-bees would need to be either a different critter ID from the hostile bees, or obtained via a different method.Bee is not a critter. It's already an existing enemy.
Through, other ones may spawn underground and dragonfly may spawn on surface.