from one of their major predators, the sea star Dermasterias imbri-cata (in Chadwick, 1987). It is possible that the Caribbean species C.

pawula may also be able to extrude mesenterial filaments so aquar-

ists should keep this in mind when placing other organisms close to

White stringy mesenterial filaments are clearly visible through the epidermis of this Rhodactis sp. viewed from below. Some of these filaments are extending towards the marginal tentacles. This specimen has lifted up its base, providing a rare glimpse of the basal structure J. Sprung it. The aggressive behaviour of C. californica also acts to control species distribution in its habitat by affecting larval settlement (it eats the larvae) or by killing newly settled larvae within reach of its mesenterial filaments (Chadwick, 1991). They have also been shown


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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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