Fish Facts: Blue threadfin salmon
who have fished the estuaries and inshore regions of Australias tropical north for any length of time are likely to have encountered the blue threadfin or Cooktown salmon, Eleutheronema tetradactylum.
Probably best known as being the smaller cousin of the King threadfin Polydactylus macrochir, the blue threadfin is found in many of the same areas that the king threadfin frequent, but is more common and an exciting sportfish in its own right.
Both species of threadfin are members of the family Polynemidae, a group of fishes adapted to life in muddy water. They have small but functional eyes, but have also evolved specialised threadlike “free sensory filaments” at the base of each pectoral fin, from which the name “threadfin” arises. The sensory filaments are likely to have taste buds on them and are used to locate their food, enabling them to feed on prawns, crabs, worms and various types of baitfish quite effectively, even when the water is very dirty. Blue threadfin have three or four shorter filaments per fin, while king threadfin have five longer ones.
Blue threadfin spend their whole life cycle in warm shallow coastal waters and tidal rivers, often in very turbid areas around mangroves, muddy bays and river mouths. Blue threadfin are found throughout the Indo Pacific region from northern Australia and PNG as far east as India and Madagascar. In Australia, blue threadfin are protandrous hermaphrodites like barramundi, i.e. in Western Australia they mature first as males in their first year at 20 cm, then change gender into females at twothree years of age around 40cm long, and grow to around 90cm fork length. However, growth rates vary markedly between regions with fish from Keppel Bay, QLD exhibiting the fastest growth 80cm in around seven years compared to other regions such as Blue Mud By, NT, where a sevenyearold blue threadfin on average is less than 40cm long. .
Situated at the mouth of the Norman River as it heads out to the fishing waters of the Gulf of Carpentaria you cant forget such an amazing accommodation any closer to the Outback near to the sea. Karumba Point Sunset Caravan Park staff offers you a style of accommodation that allows for a comfortable and relaxing break away from the hustle and bustle, or is a great place to hang your rod after a hard days fishing. All roads leading to Karumba are fully sealed so even if you dont own a 4 wheel drive, the trip to Karumba will be a comfortable one.
The growth, the animal and birdlife is sensational. Brolgas, Jackeroos, Cranes, Gannets, Wedge Tail Eagles, Hawks, Pelicans, Parrots, Galahs and White Cockatoos. Kangaroos, wild pigs, free range cattle, wild horses, emus etc, etc. Then to top that off we have fish in abundance just waiting to be caught. Oh, and if you like those buttered prawns and who don’t then get some from our shop at real good prices.
January, February March is the time to be here if you want some fabulous early season fishing and it you love the scenery and beauty of the outback, or you have never been before you need to come right now. If you are a bird watcher, you need to come here right now. And if you just want to get away from the hustle of life you need to come here right now.
So give our residents hosts, Karumba Point Sunset Caravan Park Staff, a call and they will be only too happy to help with any enquiries you may have.
BOOK NOW! for March, April, May and June. You may also do advanced booking for July, August, September, and August.
Postal Address: Karumba Point Sunset Caravan Park, PO Box 61 Karumba Queensland 4891
Tel: 07 4745 9277
Fax 07 4745 9480
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