Basically it is bottled Tuna - and the Tuna is caught the old fashion way - well on a Tuna Long Line.
According to the website the Tuna is sustainably caught - and there is no danger to dolphins etc..
They employ eight people.
Sometimes I wonder whether anything is really sustainable these days - I have read 50 year old NZ fishing books - where sport's fisherman were complaining that longlines were wiping out the Marlin.
Unrelated to the good folk at Blue Ocean Fish - Tuna always reminds me of Andy Warhol's work below: