Aquarium Maintenance

    Aiptasia Dwindling

    I guess it's probably been a month or more since we last corresponded. You had told me to wait several weeks before giving up on my berghia wiping out the Aptasia. It does seem that the Aptasia population is slowly dwindling, but I have yet to l...


    Coral Polyp

    A coral polyp is an invertebrate meaning an animal with no backbone, examples of this are anemones and jellyfish. It is also the single living unit of a coral and the creature responsible for our coral reefs. One coral piece can be covered by thousands of coral polyps that in a group are called a coral colony. A coral can also consist of just one polyp, an example of this is the Scolymia sp..

    A coral polyp has a sack like body and an opening encircled by stinging tentacles called cnidae. The coral polyp uses calcium carbonate from seawater to build itself a hard skeleton and it is this limestone skeleton that protects the soft coral polyp.

    Coral polyps are usually nocturnal which means they are closed during the day and extend their tentacles to feed at night. They can feed during the day if there is an abundance of food in the water such as zooplankton. Most reef building coral will contain live photosynthetic algae called zooxanthellae, this zooxanthellea is what gives the coral nourishment to survive.

    Coral polyps have a simple nervous system and no brain or spinal cord. This simple nervous system consists of nerve cells that loosely connect to other coral polyps on the structure. It is this nerve net that will cause other polyps to react when only a few polyps were disturbed on the coral.


    Aquarium Maintenance

      Thank You

      Just a quick message to let you know the berghia and coral arrived this afternoon intact...They were very well packaged and the heat pack was still warm...before they berghia had been fully acclimatized they were crawling around and very active. They a...

      Sunny G. from SW Missouri