Aquarium guide
Aquarium guide     

  
 
ECHINODERMS
 

ECHINODERMS

Sea urchins

These are not very easy species to acclimatize. It is possible to keep one small specimen at most, which will often live away from the light. They are herbivores that sift the substrate looking for algae to eat. In among the prickles it is possible to see the articulated pedicellariae, which end either in a tiny pincer for trapping food or a sucker. The latter allows sea urchins to develop on rigid supports or the glass sides of the tank.

Some species of sea urchins with varying sizes of prickles can be found in marine aquariums.

Some species of sea urchins with varying sizes of prickles can be found in marine aquariums.

Starfish

These are not recommended for a marine invertebrate tank, as they attack other species, such as sponges. Starfish are in fact either carnivorous, gripping their prey with their long arms that emerge from a central disc, or microphages, in which case they feed on small organisms on the bed.

The ophiuroids, sometimes called brittlestars and closely related to starfish, have articulated arms which allow them to move around quite quickly. These arms, like those of the starfish, can regenerate themselves if they break off.


<< CRUSTACEANS LIVE ROCKS >>
© 2007-2020 aquaguide.net
https://isra.news храм гроба господня в израиле израиль - храм гроба господня.
КУЛЯБСКАЯ ОБЛАСТЬ , в Таджикистане. 12 тыс. км2. Население 621 тыс. человек (1989), городское 25%. 1 город, 6 поселков городского типа (1989). Центр - Куляб. Расположена в отрогах Гиссаро-Алая. Средние температуры июля от 23 °C на севере до 30 °C на юге, января от -2 °С на севере до 0 °C на юге. Осадков от 500 до 1000 мм в год. Добыча каменной соли. Промышленность по переработке продукции сельского хозяйства. Возделывают хлопчатник, зерновые, картофель, овощи; плодоводство, виноградарство. Овцеводство, молочное скотоводство; шелководство. С нач. 90-х гг. здесь нередко происходили межэтнические столкновения.