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Starring in this month’s #CreatureFeature is an interesting little critter whose unique story epitomises the wonder of our natural environment as it changes from season to season. Rainfall across arid landscapes creates temporary pools of water, where Triops australiensis comes to life after laying dormant in the mud during the dry season.
Considered a desert crustacean, it is the only known shield shrimp native to mainland Australia. The shield shrimp is an example of a living fossil remnant of prehistoric times, functioning similarly to historic fossils. After seasonal rainfall, the extremely resilient eggs hatch in large numbers and mature into adults within weeks.
Soon after mating, it lays another generation of eggs that will remain inactive in the dried ground until the following wet season. They can survive in this state for decades while also withstanding extreme temperatures and weather conditions. Eggs disperse easily, either in the wind or on other animals’ feet.
[/vc_column_text][vc_row_inner][vc_column_inner width=”1/3″][vc_single_image image=”32584″ img_size=”400×400″ alignment=”center” onclick=”img_link_large” css=””][/vc_column_inner][vc_column_inner width=”1/3″][vc_single_image image=”32597″ img_size=”full” css=””][/vc_column_inner][vc_column_inner width=”1/3″][vc_single_image image=”32583″ img_size=”400×400″ alignment=”center” css=””][/vc_column_inner][/vc_row_inner][vc_column_text css=””]As if this species isn’t fascinating enough, it is also classed as a Branchiopoda (‘gill-legged’) meaning it breathes through about 60 legs. These legs, along with the tail, help it navigate through shallow waters. Females even use these legs to carry their eggs in ovisacs. They can grow to be seven or eight centimeters long and, as juveniles, develop a third eye called the naupliar eye, which detects light to aid in navigation.
As an omnivore, shield shrimp are far from fussy, and will eat anything from small insects to worms, plants and other crustaceans. Despite its alien like appearance with its segmented shield body and double-pronged tail, they are preyed upon by fish and birds with little to no defence abilities.[/vc_column_text][vc_column_text css=””]
NACC NRM is a member of the Commonwealth Regional Delivery Partnership panel funded by the Australian Government Natural Heritage Trust.
References | Australian Geographic | About North | Bush Heritage | ABC News | Atlas of Living Australia
Phoebe Royce – Communications Officer
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