- 1 Which of the following correctly describes how a sea star feeds on a mussel?
- 2 How do starfish hunt for food?
- 3 How do sea stars capture and eat their prey?
- 4 What structure do starfish use to open mussels?
- 5 What is the correct order for water flow entering a sea star?
- 6 What disease is killing sea stars?
- 7 What do starfish eat in a tank?
- 8 What can Starfish do with its stomach when feeding?
- 9 Do starfish have teeth?
- 10 What are sea stars eaten by?
- 11 What does the sea star do with his stomach?
- 12 What do sea stars respond to?
- 13 Does the mussel benefit from the starfish?
- 14 Do sea stars have brains?
- 15 Are Sea Stars fragile?
Which of the following correctly describes how a sea star feeds on a mussel?
Describe how some sea stars feed on mussels. First, sea stars grip their prey with their suction feet (or tube feet) and pry them apart with hydraulic pressure to eat the mussel inside the shells. It digests its prey alive. They push their stomach out of a hole and wrap their stomach around it.
How do starfish hunt for food?
The sea star eats by attaching to prey and extending its stomach out through its mouth. Enzymes from the sea star’s stomach digest the prey. The digested material enters the sea star’s stomach. Tiny organisms can be swallowed whole.
How do sea stars capture and eat their prey?
Sea stars use suction in the tube feet for movement and feeding. When the prey is opened, the sea star pushes its stomach out of its body and into the bivalve, secreting enzymes that digest the prey’s soft body tissues. The liquefied bivalve is then absorbed into the stomach.
What structure do starfish use to open mussels?
NARRATOR: Starfishes prey upon shellfish, coral polyps, and even other starfishes. This starfish is slowly wrapping its arms around a mussel. It humps its body over the mussel and attaches its tube feet to the mussel’s shells, pulling and pulling until the mussel weakens.
What is the correct order for water flow entering a sea star?
Water enters the madreporite which is an opening (inlet) for water entering the water vascular system. Water moves from the madreporite through the stone canal which leads to the ring canal. Water moves from the ring canal to the radial canals. The radial canals bring water to the tube feet.
What disease is killing sea stars?
Sea stars along much of the North American Pacific coast experienced a massive die-off in 2013/14 due to a mysterious wasting syndrome. The disease, called “ sea star wasting syndrome” (SSWS) has persisted at low levels in most areas, and continues to kill sea stars.
What do starfish eat in a tank?
As we mentioned before, they are grazers and eat food which has fallen to the bottom of your tank, including fish flakes, pellets and any other food. Most species enjoy a meaty diet of mollusks, so putting a few clams or mussels in your tank is a sure way to keep them happy.
What can Starfish do with its stomach when feeding?
When some species of starfish find a tasty snack, such as a mussel or an oyster, they extend their stomach out of their mouth to digest the soft parts of their prey. This creates a soup-like substance that they then slurp back into their body to finish off the feast.
Do starfish have teeth?
Because sea stars have no teeth, they cannot chew. They must make their food soupy before they can eat it.
What are sea stars eaten by?
Many different animals eat sea stars, including fish, sea turtles, snails, crabs, shrimp, otters, birds and even other sea stars. Though the sea star’s skin is hard and bumpy, a predator can eat it whole if its mouth is large enough. Predators with smaller mouths can flip the sea star over and eat the softer underside.
What does the sea star do with his stomach?
Stomach. A sea star has 2 stomachs, the cardiac stomach and the pyloric stomach. It can push the cardiac stomach out of its mouth, in the centre of its underside, to engulf prey or insert it into prey (between 2 shells, for example). The stomach then secretes a powerful digestive enzyme to break down the prey.
What do sea stars respond to?
Many starfish also possess individual photoreceptor cells in other parts of their bodies and respond to light even when their eyespots are covered.
Does the mussel benefit from the starfish?
A starfish feeds by first extending its stomach out of its mouth and over the digestible parts of its prey, such as mussels and clams. ” Starfish predation has an economic impact as they feed on important shellfish, such as mussels and clams.
Do sea stars have brains?
Starfish, also known as Sea Stars, are one of the most beautiful looking animals in the vast ocean. They have a surprisingly unusual anatomy, with no brain or blood, yet are able to digest food outside their body.
Are Sea Stars fragile?
(In sea urchins and sand dollars, their skeletal plates are fused.) When sea stars are born, they’re symmetrical. The brittle star, a relative of the sea star, is named for its fragile appendages, which can easily break off if caught by a predator or under a rock tossed by the crashing tides.