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Barnacle: Difference between revisions
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The eggs will hatch as a nauplius: small larval creatures with one eye, two antennae, and several mandibles. [http://webs.lander.edu/rsfox/invertebrates/balanus.html] The nauplius will usually molt six times before it morphs into the next stage. It usually moults once before it is released from the mantle cavity and into the open ocean. [http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | The eggs will hatch as a nauplius: small larval creatures with one eye, two antennae, and several mandibles. [http://webs.lander.edu/rsfox/invertebrates/balanus.html] The nauplius will usually molt six times before it morphs into the next stage. It usually moults once before it is released from the mantle cavity and into the open ocean. [http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | ||
After it has spent its time as a free-swimming creature and has moulted enough it will change into its next form. The cypris stage of a barnacle is a [[bivalve]] with the creature between the two shells. The cypris has one naupliar eye, and two compound eyes that it uses to navigate around the ocean. It has an antennae from its previous form and six pairs of appendages that help it to move around the ocean.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] It then uses its attennae to find an appropriate location to settle. [http://www.absoluteastronomy.com/topics/Barnacle] | After it has spent its time as a free-swimming creature and has moulted enough it will change into its next form. The cypris stage of a barnacle is a [[bivalve]] with the creature between the two shells. The cypris has one naupliar eye, and two compound eyes that it uses to navigate around the ocean. It has an antennae from its previous form and six pairs of appendages that help it to move around the ocean.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] It then uses its attennae to find an appropriate location to settle. This search can take days or weeks, and the cypris conserves energy by not feeding. When the cypris has found somewhere to settle it extends its antennae to the surface and secretes a cement-like substance. It then pulls itself to that surface and becomes permanently attached. After time it will eventually morph into its adult form.[http://www.absoluteastronomy.com/topics/Barnacle] | ||
