04-08-2008, 01:52 AM
| || |
There could be any number of reasons for it, but fish are not all that different from people when it comes to having individual personalities. It is not typical for a butterfly of any species to bother a starfish... sometimes we have to live and learn.
Also, please remember that a lot happens in that tank when you're not watching it, especially at night. A large part of reef animals are nocturnal, so when the lights go off and you go to bed, they are just getting started.
It is possible that damage could have been done during the night, or that something completely unrelated was wrong with the starfish. When an animal dies or starts to die, it's normal to see others picking at it.
Turbo snails don't eat fish, but if a fish gets sick and lays on the bottom, or dies... the turbo is right there with everything else feeding on it.
Those particular starfish are not one of the hardiest species, either. Many come in with issues that aren't apparent right away. Some starfish are very sensitive to stress, and just moving them can kill them... and its a slow death.
You're lucky to have a butterfly who's not so picky about feeding. That also is not "average" for them. How much live rock is in the tank? If animals don't have enough suitable shelter, they can become vulnerable to bullys. If rock is spaced too far apart, moving from one end or section to another would also leave them vulnerable to bullys and predators.
Can you post a picture of your tank?