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There are about 900 species of shrimp in Australia, and they are found in a variety of environments, ranging from intertidal pools to deep-sea hydrothermal vents. They are also found in estuaries and freshwater lakes and dams. Australia's only native species of shield shrimp, Triops australiensis, can be found in hot and dry places, often spawning in tiny rain pools. Queensland is home to the most species of Australian prawns, including the king, banana, tiger, endeavour, coral, scarlet, bay, and red spot prawn.
| Characteristics | Values |
|---|---|
| Number of shrimp species in Australia | 900 |
| Types of shrimp found in Queensland | Striped Bumblebee Shrimp, Red-striped Shrimp, Red-barred Snapping Shrimp, Graceful Sky-blue Shrimp, Eastern King Prawn, Western King Prawn, Coral Sea Marbled Shrimp |
| Types of prawns farmed in Australia | Black tiger prawns, banana prawns |
| Native species of shield shrimp in Australia | Triops australiensis |
| Where Triops australiensis is found | Hot and dry places, tiny rain pools, drainage ditches, freshwater lakes and dams |
| Where prawn farms are found in Australia | Northern parts of Australia, mainly Queensland |
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What You'll Learn
Australia has about 900 shrimp species
Australia is home to a diverse range of shrimp species, with approximately 900 species found across the country. These crustaceans are highly adaptable and can be found in a variety of environments, showcasing their ancient lineage with a fossil record dating back to the mid-Jurassic, around 180 million years ago.
One of the most distinctive shrimp species in Australia is the shield shrimp, Triops australiensis, the only known native species of its kind in the country. These unusual crustaceans are well-adapted to the harsh desert conditions and can be found in hot and dry regions, often spawning in tiny rain pools, drainage ditches, freshwater lakes, and dams. Their unique life cycle allows their eggs to survive desiccation, enabling easy dispersal by the wind to new locations. This species even has a third 'naupliar eye' in addition to the regular pair of eyes, which helps them navigate towards or away from light.
In addition to the shield shrimp, Australia is also home to the Striped Bumblebee Shrimp, Gnathophyllum americanum, and the Giant Tiger Prawn, Penaeus monodon, which can reach impressive sizes, with females measuring up to 35 centimetres and males close to 27 centimetres in length. Shrimp of the family Alpheidae, commonly known as snapping or pistol shrimps, possess a distinctive bulky claw that creates an underwater shockwave to stun their prey.
Freshwater shrimp, such as those found in Central Queensland, New South Wales, Victoria, Tasmania, and South Australia, are not just fascinating creatures but also play a vital ecological role. They contribute to a balanced and healthy aquarium ecosystem and are a food source for many fish species and even the platypus. Their vibrant colours and natural tank-cleaning abilities make them a popular choice for aquarium enthusiasts.
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T. australiensis is Australia's only native shield shrimp species
T. australiensis, or Triops australiensis, is Australia's only known native species of shield shrimp. This unusual desert crustacean can be found wherever it's hot and dry, spawning in tiny rain pools, drainage ditches, freshwater lakes, and dams. They are most commonly found in pools and lakes that periodically dry up, which is advantageous as their eggs need to be completely desiccated before the larvae can develop and hatch when they get wet again.
T. australiensis is sold in pet shops as a powder that can be brought to life with water. When it hatches, it begins life as a type of crustacean larva called a nauplius, which has a third 'naupliar eye' in addition to the regular pair of eyes. This extra eye is quite simple, containing just a few light-sensitive cells to help the shield shrimp move towards or away from the light.
The naupliar eye is retained into adulthood. T. australiensis is an important part of the ecosystem in arid regions of Australia, providing food for other organisms and helping to maintain the balance of freshwater ecosystems.
As the only native shield shrimp species in Australia, T. australiensis is of particular interest to scientists and ecologists studying the unique fauna of the country. It is also a popular subject for nature photographers and artists due to its unusual appearance and ability to survive in extreme environments.
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Shrimp are found in Queensland
While the terms prawn and shrimp are often used interchangeably, there are some key differences. Prawns have claws on the first three pairs of legs, whereas shrimps have claws on the first two pairs. The second abdominal segment of a shrimp overlaps with the first and third segments, while in prawns, there is no overlap. Queensland is home to a variety of shrimp species, including the Striped Bumblebee Shrimp, Red-striped Shrimp, Red-barred Snapping Shrimp, Graceful Sky-blue Shrimp, Coral Sea Marbled Shrimp, and the Giant Tiger Prawn, which can reach impressive lengths of up to 35 centimetres for females and almost 27 centimetres for males.
In addition to these species, Queensland is also home to the Eastern King Prawn, with its cream to yellow body, and the Brown Tiger Prawn. The Queensland Museum provides valuable resources for educators, parents, and students interested in learning more about the rich cultures and histories of First Nations Queensland Aboriginal and Torres Strait Islander peoples, as well as the diverse range of crustaceans found in the state.
Australia is also home to the shield shrimp, Triops australiensis, the only known native species of shield shrimp in the country. These unusual crustaceans can be found in hot and dry environments, spawning in tiny rain pools, drainage ditches, freshwater lakes, and dams. Their eggs have an interesting adaptation, as they need to be completely desiccated before the larvae can develop and hatch when rehydrated. This unique life cycle allows for easy dispersal by the wind and ensures the species' survival even in arid conditions.
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Shrimp are found in estuaries and freshwater lakes
The Australian glass shrimp has a transparent body with some mottling and is similar in shape to other shrimp. As decapods, they have five pairs of legs and thick tufts of hair-like setae at the end of their fingers. They typically grow to a length of 3 cm (1.2 in), with a maximum length of 4 cm (1.6 in). The eggs are carried under the female's tail during August and September and hatch in late spring to early summer.
In addition to the Australian glass shrimp, other species of shrimp are also found in Australia's estuaries and freshwater lakes. For example, the cherry shrimp, native to Taiwan, has been introduced to Australia and can be found in various aquatic habitats, including lakes and ponds. Yabbies, a type of Australian freshwater crayfish, are also commonly found in lakes, dams, and billabongs across the country.
The presence of shrimp in these freshwater habitats plays a vital role in creating a balanced and healthy ecosystem. They are an important food source for many fish species and even the platypus. Additionally, shrimp help maintain the cleanliness of the water by feeding on algae and other organic matter.
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Shrimp farms are found in northern Australia
Extensive prawn farming, a low-intensity and nature-like farming model, is well-suited to the region, especially in rural and remote areas. This method of farming has been successful in Vietnam, and the similar climates of the two countries indicate that it could be commercially viable in Australia. The extensive prawn farming system requires little to no additional feed, as the prawns get most of their nutrients from microorganisms in the pond itself, making it more sustainable and cost-effective.
However, there are challenges to be addressed, such as the impact of the northern monsoon, which can turn saltwater into freshwater in prawn ponds, and competition from wild prawns. The CSIRO is working to overcome these challenges and unlock the potential of aquaculture in Australia's Top End. The establishment of a pilot prawn farm on the Tiwi Islands is being considered, which could lead to further expansion and provide opportunities for Indigenous communities in the region.
In addition to the CSIRO's initiatives, private companies are also investing in shrimp farming in northern Australia. Project Sea Dragon, based in the Northern Territory, aims to be Australia's largest prawn farm, with a $78 million construction package for phase one. The project highlights the advantages of Australia's climate conditions and developed infrastructure compared to typical prawn and shrimp farm locations in Asia.
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Frequently asked questions
Australia's only native species of shield shrimp, Triops australiensis, can be found in hot and dry places, including tiny rain pools, drainage ditches, freshwater lakes, and dams.
While the terms are often used interchangeably, prawns and shrimp represent two major biological divisions based on gill and limb anatomy. Specifically, prawns have claws on the first three pairs of legs, while shrimp have claws on the first two pairs.
Prawn farms are found in the northern parts of Australia, mainly in Queensland. The warmer waters enable the prawn to grow more rapidly and allow year-round production.
