We have had a few goldfish lasting a couple of years each. Not an amazing fish-keeping history
What do we need? I understand they're marine fish and not tropical so it's salt water. Will it be expensive to set up the tank? Can I just have one little fish swimming about on its own or will he need some pals?
Also, I had a quick look in the pet shop this morning and what was labelled clownfish was miniscule and looked nothing like Nemo. Do they grow into their appearance?
Grateful for any advice/tips.