Angelfish and Bala shark schooling

[Angelphish]

I glanced over at my aquarium a few minutes ago and noticed some interesting behavior from my Bala shark. Early today, I purchased two 4" Veil tail Angels. They seem to be coming along. They're eating well and have started to roam the tank. The only problem in the aquarium is the the other Angelfish pair doesn't like their presence. The pair continually picks at the new Angels, but I expect them to stop after a few days as they have done before.
This behavior didn't seem strange to me, but it was the Bala shark who was acting different. The Bala shark seemed to be schooling with the new Angels and would chase off the other pair when they attack the Veils. Occasionally the Bala would swim with the black lace/leopard pair (the one that I owned before the Veils) as if he was monitoring them. Has anyone else experienced this behavior? Is this normal? My Bala is 5".
I will try to attach pictures once I see the Bala acting this way once more.

 

[tlindsey]

I glanced over at my aquarium a few minutes ago and noticed some interesting behavior from my Bala shark. Early today, I purchased two 4" Veil tail Angels. They seem to be coming along. They're eating well and have started to roam the tank. The only problem in the aquarium is the the other Angelfish pair doesn't like their presence. The pair continually picks at the new Angels, but I expect them to stop after a few days as they have done before.
This behavior didn't seem strange to me, but it was the Bala shark who was acting different. The Bala shark seemed to be schooling with the new Angels and would chase off the other pair when they attack the Veils. Occasionally the Bala would swim with the black lace/leopard pair (the one that I owned before the Veils) as if he was monitoring them. Has anyone else experienced this behavior? Is this normal? My Bala is 5".
I will try to attach pictures once I see the Bala acting this way once more.

Normal Cichlid behavior,.Angelfish pair has established their territory thats the reason for the chasing of the new inhabitants.

 

[tlindsey]

Normal Cichlid behavior,.Angelfish pair has established their territory thats the reason for the chasing of the new inhabitants.

As for the Bala Sharks never heard of them protecting any specie of fish.

 

[Angelphish]

Finally got the camera to work, Although I was only able to get one picture of the bala with the Veils.

 

[Angelphish]

The first image are the two new Angels. In the background of the second picture, the Bala is swimming around the Angels. If I had my Camera out before, I would have had a much better picture. The Bala shark was swimming with the Angels closer than they were swimming with each other, but as I said, he stopped before I grabbed the Camera.

 

[jeaninel]

Balas like to swim in groups, especially younger ones. Perhaps yours feels more secure swimming with the other fish.

 

[Angelphish]

Balas like to swim in groups, especially younger ones. Perhaps yours feels more secure swimming with the other fish.

That is a possibility. The Bala in the picture is 5". I do have another Bala, although it is only 1".