- 1 In what ways does the soft bodied squid protect itself from predators?
- 2 How does a bivalve breathe?
- 3 How do mussels breathe?
- 4 What enables aquatic mollusks to breathe underwater?
- 5 How do molluscs defend themselves?
- 6 Has anyone been killed by giant squid?
- 7 Do mussels have lungs?
- 8 What two types of gastropods lack a shell?
- 9 Do mussels live underwater?
- 10 What is the lifespan of a mussel?
- 11 What happens if you eat a dead mussel?
- 12 How long do mussels live for?
- 13 Are mollusks stationary?
- 14 How do bivalves reproduce?
- 15 Why are mollusks so successful?
In what ways does the soft bodied squid protect itself from predators?
In what ways does the soft – bodied squid protect itself from predators? Besides being able to move quickly, these cephalopods use camouﬂage to avoid being detected. By using camouﬂage, an animal such as an octopus can change its appearance so that it blends in with the natural surroundings.
How does a bivalve breathe?
Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable “foot” that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.
How do mussels breathe?
The gills have three functions: (1) respirationlike fish, mussels use their gills to breathe, (2) filter feedingthe gills move food particles to the mouth, and (3) in females, the gills incubate baby mussels (larvae) until they are mature and ready to be released.
What enables aquatic mollusks to breathe underwater?
Aquatic mollusks “ breathe ” under water with gills. Gills are thin filaments that absorb gases and exchange them between the blood and surrounding water. Mollusks have a circulatory system with one or two hearts that pump blood.
How do molluscs defend themselves?
Mollusks have soft bodies, which makes them easy prey for many other kinds of animals. On way that mollusks protect themselves is to build a hard shell around their bodies. Clams, oysters, snails, mussels, and scallops all have shells. As long as the shell is not broken, it is hard for other animals to eat them.
Has anyone been killed by giant squid?
They were attacked by a huge giant squid, but one of the fishermen cut off one of the squid’s arms. The squid fled back into the deep with its two victims. The third sailor’s body was crushed, gone mad in the evening, and he died —so he could actually be considered a victim.
Do mussels have lungs?
Mussels, in contrary to all other molluscs live exclusively on filtration. From the surrounding water they not only take oxygen to breathe, but also food. Mussels and Clams (Bivalvia)
What two types of gastropods lack a shell?
However, not all gastropods have shells, the nudibranchs (sea slugs) and terrestrial slugs lack shells. In aquatic gastropods, gills are found in the mantle cavity; in terrestrial gastropods, the mantle is richly supplied with blood vessels and functions as a lung when air is moved in and out through respiratory pores.
Do mussels live underwater?
One obvious difference between freshwater and marine mussels is that freshwater mussels live in freshwater streams, rivers, ponds and lakes while marine mussels live in salt water oceans and bays. Marine mussels reproduce by releasing their eggs and sperm into the water.
What is the lifespan of a mussel?
Most mussels live around 60 to 70 years in good habitat. FEEDING: Mussels feed by filtering algae, bacteria, phytoplankton and other small particles out of the water column. They are in turn preyed upon by fish, reptiles, amphibians, birds and mammals.
What happens if you eat a dead mussel?
You can eat mussels raw, steamed, boiled or fried as an appetizer or entrée. The meat of dead mussels deteriorates, increasing your risk of microorganism contamination, food poisoning, infectious disease and other health problems.
How long do mussels live for?
Although some mussels can live for up to 50 years, the brown mussel that we find along the east coast of SA only lives about 2 years.
Are mollusks stationary?
The majority of mollusks inhabit seas and oceans, particularly in the littoral zone. Most marine mollusks lead a creeping mode of life, but some forms rest stationary on the bottom or burrow into it (the majority of Bivalvia). Some Gastropoda and Cephalopoda (such as squids) are strong swimmers.
How do bivalves reproduce?
Marine bivalves reproduce by releasing prodigious numbers of eggs and sperm into the water, where external fertilization occurs. The fertilized eggs then float in the surface plankton. Within 48 hours after fertilization, the embryo develops into a minute, planktonic, trochophore larvae.
Why are mollusks so successful?
If success is measured in terms of number of species and variety of habitats to which they have become adapted, then molluscs are one of the three most successful groups in the animal kingdom. Molluscs have evolved a distinctive and highly successful body plan that features a mantle, shell, muscular foot, and radula.