There are 5. The 5th is the most shy of the lot but was only like that when i put them in, now when i feed them i can have the lights on and sit in front and watch them while they eat and they dont bother with me being there. Seeing how much they are loving the bigger tank i am going to do some planning and in 2 months time move them to a 150 gal, even if it means moving my bed out