Sand dollars don't protect themself, they just sit their........ :)-
sand dollars got there name because they are shaped like a coin and they dig themselves into the sand
Because that is where they live, that way they can burrie themselves in the sand to get protection from predators.
They protect themselves by burying themselves under sand and of course their poisones bites.
They are not harmful although baby dollars clone themselves when they sense danger.
Flounder are flat and can quickly cover themselves with silt/sand on the ocean floor for camouflage and hiding.
Flounder are flat and can quickly cover themselves with silt/sand on the ocean floor for camouflage and hiding.
Yes, clams have to burrow into sand or mud in order to protect themselves
The structural deference between them is that Sea urchins are more globular whereas sand dollars are flattened. Unlike sea urchins, the sand dollars burrow themselves when threatened. Sand dollars have anus opening at their back side whereas the sea urchins have it at the top.
They would use the clay and sand in the desert to build pueblos. Joy I.
Sand dollars actually live on the bottom of the ocean or under the ocean floor. They can move throughout the sediment. The have things called Podias which move the sand dollar's food towards its food opening. They have few natural predators, some of them are ocean pouts and sunflower starfish. You will commonly find them broken mostly because of the undertow and the tides. Sometimes you will find a sand dollar and it will most likely be a dead one.
They bury themselves to protect themselves from predators while they sleep.
Sand dollars turn your hand yellow because you have taken it out of the water and it feels threatened. The animal then releases hormones that can injure it's attacker if it gets in it's eyes or mouth...... Make sure to wash your hands if this gets on you. -ps- I love sand dollars.