Salt water fish are great eating, not overly flavorsome, but firm white flesh, with few or at worst large bones in the fillet.
Dam or billabong fish are prone to being a darker slightly muddy tasting fish generally.
They grow fast and big, changing sex from male to female around the size of 900mm, they are a regular catch by those in the know, at sizes above 1200mm.
All female and all are released to breed another day.