What Are Mesenterial Filaments

the different types, suffice it to say that some are specialized for capturing food items (e.g. spirocysts) while others play defensive or aggressive roles e.g. homotrichs) (see den Hartog, 1980, for a complete description of the various types). Nematocysts can be found in tentacles, the swollen tips of tentacles (acrospheres), the mesenterial filaments and the body column, and are used as taxo-nomic characters for identification purposes (see den Hartog, 1980).

Figure 3.2 Some types of nematocysts found in corallimorphs

After Schmidt, 1974

Corynactis

Aggressive interactions in corallimorphs have only been observed in two genera, Corynactis (spirocysts and homotrichs) and Disco-soma (homotrichs). However, all genera possess at least some form of nematocysts, and these can be quite potent, especially in Pseudo-corynactis, and is likely that further studies will bring this to light.

Mesenterial Filaments

Studies of aggression in the temperate species, Corymactis calif or nica, have shown that these corallimorphs can be quite lethal to adjacent organisms such as sea anemones and corals. Upon contact with an adjacent organism the tentacles will retract and then stretch out again. After a few hours of this behaviour mesenterial filaments begin to appear from the mouth, the tips of the tentacles, the body column, or from the base of the polyp (Chadwiek, 1987). The mesenterial filaments can extend from 1.0 to 42.0 mm from the polyp and completely envelop the neighbouring organism. These filaments are packed with nematocysts and digestive enzymes. Not only can they destroy adjacent coral tissue, they can also digest large prey items and then ingest them (Chadwiek, 1987). Corynactis californica has also been observed to use these filaments to protect themselves

The COMPLETE guide to Aquariums

The COMPLETE guide to Aquariums

The word aquarium originates from the ancient Latin language, aqua meaning water and the suffix rium meaning place or building. Aquariums are beautiful and look good anywhere! Home aquariums are becoming more and more popular, it is a hobby that many people are flocking too and fish shops are on the rise. Fish are generally easy to keep although do they need quite a bit of attention. Puppies and kittens were the typical pet but now fish are becoming more and more frequent in house holds. In recent years fish shops have noticed a great increase in the rise of people wanting to purchase aquariums and fish, the boom has been great for local shops as the fish industry hasnt been such a great industry before now.

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Responses

  • DANIEL
    What are mesenterial filaments?
    6 years ago
  • Michael
    Do mesentarial filaments dissolve?
    3 years ago
  • Antonio
    What is the purpose of the digestive filament in the coral reef?
    5 months ago

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