Question: What differences are there in behaviour between fish that live in the sea and fish kept in a tank?

Joanna Cruden answered on 19 Jun 2012:

This is a difficult question to answer, I think it is difficult with a fish in a tank because if they just swim around and around whereas with a mammal we may think that is negative behaviour and signs of mental un-health, it is not as easy to determine with fish unless you are a specialist in fish and I am not sure we really know the answer because we are only just starting to accept they have memories and feel stress and pain. So I don’t really know the answer to this but it has made me think and I will look further into it