Australostichopus

In New Zealand, A. mollis is found around the entire coast line of the country, sometimes co-existing with reef structures; and from New South Wales to south Western Australia. The species principally inhabits the littoral at low tide level on sand, as well as in mud in protected areas. Their vertical range goes from shallows waters on the coast to around 200 metres of depth. ==Anatomy==

Adult size is typically from 13 to 25 cm. Body is soft, and colour varies from light mottled brown to black. A tube foot is present ventrally or extending up the whole body. Tentacles (20) with disc shaped tips surround the slit-like mouth. Retractor muscles are absent. Dorsally, A. mollis has pointed papillae which can be reduced on preservation. ==Feeding==

Described as detritivores, A. mollis mainly capture particles of organic matter from the substrata, which is highly nutritious. ==Reproduction==

Via sexual reproduction, and sexes are generally separate, however some hermaphrodites have been found. Population sex ratio is 1:1. and periodicity of spawning is regulated by lunar cycles, specifically following a full moon. Morphologic changes in reproductive periods include females changes in gonad colour and oocyte numbers, while in males there is an increase in the amount of spermatozoa in particular zones described as "wet mounts of 'mashed' gonad tissue". Furthermore, there is an increase in spermatozoa in the lumen of histological sections. Studies suggest that spawning may occur repeatedly during a single reproductive season. ==Auto-evisceration==

Like other holothurians, A. mollis has the ability to regenerate its internal organs after undergoing a phenomenon called auto-evisceration. This process, which is thought to be induced by external stimuli, is characterized by violent and rapid expulsion of organs, followed by regeneration, which occurs at a slower rate than in other genera. ==Predation==

Available information posits the existence of just one predator: the starfish Luidia varia, observed in two cases. To date there is no evidence to suggest any fish or other organism preying on A. mollis. ==Juveniles==

Juveniles are distributed in the shallow sub-tidal zone (5–8 m of depth), ==Fishery==

Processed sea cucumbers are traded under the name of beche-de-mer, representing an important fishery in South Pacific and Asian nations. In New Zealand, where its exploitation occurs on a small-scale, this species is under the New Zealand fisheries quota management system and is principally caught by free-diving. Sea cucumber yields can be very profitable if the resource is adequately processed, or if a value-added policy is implemented. Currently, due to the expansion of commercial exploitation of A. mollis in New Zealand and Australia, first attempts at massive culture are being carried out. A new approach to sea cucumber farming has been the so-called polyculture, where sea cucumber are bred together with mussels and finfish, consuming the wastes from nearby farming as a food supply, and at the same time providing new products. Trials farming sea cucumber with abalone have shown not to be biologically viable. ==Larvae development==

The complete larvae stage takes approximately 21 days. After fertilization there are seven stages of larva metamorphosis: cleavage, blastocyst, gastrulation, auricularia (subdivided in early, mid, late), doliolaria (mid metamorphic stage pre settlement), penttactula and the last settled sea cucumber larva, visible to the naked human eye, which develops into the final organism. ==Polycultures==

Considering the detritus-feeding characteristic of holothurians, and their role on coastal marine systems, and Pacific oysters' farms. In land based systems, according to the energetic requirements of adult sea cucumbers, results have inferred that waste production of an industry standard-type abalone lacks sufficient energy to meet A. mollis metabolic needs. However, there is suggestion that feeding juveniles from these wastes could be feasible. Conversely, waste generation from fresh mussels have proven to be the source of enough energy to sustain juvenile stocks, assuming a suitable scale to ensure the supply. Sea cucumbers also have been used as bioremediation units in scenarios of high organic waste pollution from farming, such as salmon. In this instance, this carbon source is transformed into body tissue; an example of efficiently using supplies and producing an alternative culture. ==References==