Peppermint shrimp
Lysmata wurdemanni, commonly known as the peppermint shrimp, is a species of shrimp.
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ScavengerScavengers are animals that consume dead organisms that have died from causes other than predation or have been killed by other predators. While sc...
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OviparousOviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
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starts withIt reaches 7 centimetres (2.8 in) in length, and is named for the bright red stripes on its otherwise translucent body, which are reminiscent of peppermint candies such as a candy cane. Its eggs, by contrast, are bright green.
Lysmata wurdemanni was originally described from specimens collected at Key West, Florida and Charleston, South Carolina. Its range extends along the Atlantic seaboard of the United States from Long Island to Florida, and along the Gulf of Mexico from Florida to Port Aransas, Texas. It may also occur in the northern Caribbean Sea, but this has not been confirmed.
Lysmata wurdemanni is a protandric simultaneous hermaphrodite. This means that it begins as a male but may later become a hermaphrodite. It has four moults as a male before changing sexes to become a euhermaphrodite. However, under certain conditions some males never change to hermaphrodites. In the euhermaphrodite stage the shrimp act as a male between moults and as a female immediately following a moult. During this hermaphroditic stage the shrimp gradually lose their male organs, likely because more energy is being allocated to the development of female reproductive organs.
Lysmata wurdemanni employs a 'pure searching' tactic for mate-finding in which the males are constantly searching for receptive females. Males use olfactory organs (aesthetascs) on their antennules to detect soluble female sex pheromones (distance pheromones). These pheromones are released 2–8 hours prior to female moulting. Guided by these chemical signals, males make their way to the female and will approach her. The male will then 'taste' the female's contact pheromones with his aesthetascs to make sure she is a suitable mate. If the chemicals are right, courtship may commence and, if courtship goes well, copulation will ensue. This process is very brief and occurs immediately post-moult, while the female's cuticle is new and soft.
