This creature probably got its name when someone picked one up and an arm fell off.
What is a brittle star?
100
This little animal resembles a pincushion with red, purple, green, or other color pins branching out in many different directions.
What is a sea urchin?
100
The sand dollars you find on the beach are usually not living, but this.
What is dead?
100
Sea cucumbers eat this.
What is sand?
200
The hole on the underside of a sea star, in the center of its ray's disc.
What is a sea star's stomach?
200
Like a crab, a brittle star will drop this to escape if it is touched.
What is its arm?
200
Though they don't have arms, sea urchins are completely covered in this.
What are spines?
200
A living sand dollar is covered with tiny hairs, called these.
What are spines?
200
When threatened, a sea cucumber literally spills this.
What are its guts?
300
It's stomach comes out of it's body to engulf its prey.
How does a sea star eat?
300
Brittle stars use these, not their tube feet, for movement.
What are the muscles in their arms?
300
This animal actively hunts for sea urchins, to crack them open with a rock and eat the insides.
What is a sea otter?
300
Like sea stars, sand dollars have tube feet, but the are not used to move around, but to do this.
What is breathe?
300
A sea cucumber's mouth is usually surrounded by these.
What are tentacles?
400
Tubes feet in concentrated gooves than run down the center of each ray.
What are ambulacral grooves?
400
These large brittle stars with many rays are often mistaken for plants.
What is a basket star?
400
Thought it is O.K. to call it a shell, this rounded body of a dead sea urchin is properly called this.
What is a test?
400
A sand dollar actually uses its tiny spines to do move around and do this.
What is dig in the sand?
400
When a sea cucumber spills its guts, it uses the long sticky threads to do this to its predator.
What is glue its gills or throat shut?
500
At the end of each arm are spots which are only able to tell light from dark.
What is an eye spot?
500
Brittle rays use their branched rays, which are covered with a sticky substance, to catch this from the water.
What is plankton
500
A sea urchin uses a system of five special teeth called this, to scrape algae or debris off rocks.
What is Aristotle's lantern?
500
On the underside of a sand dollar, you will see a star pattern radiating out from the center. This star pattern is composed of grooves that are called this.