Hierarchy

[Kirby]

I read on yahoo answers that when kept in groups, green spotted puffers form hierarchies? Just how true is this, and does anyone have ant additional information on the topic?

[bertie 83]

You will certainly always get a dominant fish when you co-house aggressive creatures like these together.

[purplecandle]

If you have a large tank then a hierarchy may form.

But if your tank is too small...eventually they will probably kill or hurt each other for territory.

You will need 30 gallons for each greening spotted puffer.

Once they reach adulthood they get mean!

[Kirby]

I have a 3ft x 2 x 2 at the minute will upgrade if they need it but they are tiny at the minute lol.

Are there any Puffers that aren't so aggressive?