This year there are seven red-tagged barra worth $1 million each swimming around Territory waterways.

Organisers say tagged barra have been released in Katherine region waters, although they won't say if it's a million dollar tag.

Along with the seven chances to land $1 million, the Million Dollar Fish from all the previous seasons are still out there.

Once any one of the seven Million Dollar Fish are caught, the remaining six revert to $10,000 value.

The previous season's $1 million tag numbers to look out for include:

There are a further 100 red-tagged barra worth $10,000 each.

There are also 20 $5000 purple-tagged barra - win $2500 for you, and $2500 for the MDF charity of your choice (Cancer Council NT, Star Ball or the Shimano Junior Indigenous Guide Program through the Hayden & Reynolds Project).

For the first time ever, MDF has released a new category of tagged fish: the Double Tag Barra. With one released in each MDF fishing location across the Top End (totalling five fish), fishos who catch the Double Tag Barra win $10,000, plus $5000 for a mate who's been having a tough time this year.

Registered Season 6 participants who reel in a tagged fish can score even more with the first-ever official MDF shirt. Made in Darwin by BigFish Gear, the limited edition shirt could be your lucky charm - if you're wearing it when you catch a tagged fish, you'll land an extra $1,000 of prizes.

By simply registering for Season 6 you also go into the Lucky Prize Pool, with $50,000 worth of prizes from MDF partners up for grabs.

The MDF competition reels in fishing fanatics from all over, and anglers have caught more than 40 tagged fish since the competition began in 2015.

The elusive Million Dollar Fish is yet to be landed.

Season 6 starts on October 1 and runs until March 31, 2021.

You must be registered to claim a prize. Registrations are now open. Register for free at www.milliondollarfish.com.au

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