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Fish, Crustaceans & Cephalopods

Beche De Mer
(Sea Cucumber)

Also known as Sea Jacket, Chinaman leatherjacket, Yellow jacket and chunks.

Ocean jackets have a long snout and their head length is much greater than their body depth.  The anterior rays of their dorsal and anal fins are much longer than the remaining rays and there are 32-32 rays in the dorsal fin.  Adult females and juveniles are yellowish brown, with orangey or yellowish fins, and the juveniles have 1-4 longitudinal dark brown stripes along their body.  Adult males are greenish grey, sometimes with two or three dark blotches on their sides, and they have bright yellow fins.

This species of leatherjacket is considered to be endemic to Australia, although a single specimen has been reported from New Zealand.

Ocean Jackets are found from very shallow water (2m) to water as deep as 200m.   There is a tendency for their average size to increase with water depth.   Juvenile ocean jackets have been caught in seagrass, over bare sand and on rocky reefs.  Adults tend to be absent from seagrass areas.  In northern New South Wales, ocean jackets are occasionally present in reef areas, but in South Australian waters, they are common over sand and coral sea beds.

Ocean jackets spawn off South Australia between late April and early May in waters 85-200m deep, several hundred kilometres offshore.  Each season, female ocean jackets averaging 40cm total length produce about 700,000 spherical eggs measuring approximately 0.6mm in diameter when ripe.  Some large females can produce up to 2 million eggs.

Adult Ocean Jackets are carnivorous, feeding mainly on salps, gastropod molluscs, crustaceans and fish.  Fishers have reported that squid are also eaten.  Ocean jackets form loose, small schools when feeding.

The principal commercial fishery uses traps, with a wide single opening and are set at depths from 60m to 150m.  The traps are baited with rock lobster heads and set at dawn, and are retrieved about 2 hours later.  The fish are immediately headed, gutted and chilled.

Most Ocean jackets are sold as fresh trunks.  Large amounts of ocean jackets caught keeps the price low.

Angling for Leather Jacket Fish:

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Cooking Leather Jacket Fish:

Leatherjackets derive their name from their skin, which should be removed before serving. This can be done after cooking, for easier and cleaner removal. Under their tough skin these fishes have a white flesh with a pleasing light flavour. The flavour is best when the leatherjacket is fresh.

Because of their firm texture, leatherjackets are very good for Thai-style curry or a stir-fry. They are also excellent for fish balls as the flesh holds together very well.

Smoking leatherjacket is an excellent method of preparation try the tea-smoked leatherjacket with avocado and frisee lettuce salad .

When baking or grilling it is advisable to prepare leatherjacket whole. Remember to incorporate lashings of lemon and cracked black pepper for better flavour and texture.

Recovery rate, fillets: 30% from whole fish

Microwave Cooking Times for Fish
- Fish fillets – 5 minutes per 500g on medium-high, +50 seconds more for thicker fillets, or until flesh flakes
- Whole fish - Large – 6 minutes/750g on medium
- Whole fish – Small – 3-4 minutes on medium

Commercial Fishing for Leather Jacket Fish:

More links about Leather Jacket Fish