/fɪʃ/ plural fish or fishes. A1 [ C or U ] an animal that lives in water, is covered with scales, and breathes by taking water in through its mouth, or the flesh of these animals eaten as food: Several large fish live in the pond.
What is the best definition for fish?
fish. / (fɪʃ) / noun plural fish or fishes. any of a large group of cold-blooded aquatic vertebrates having jaws, gills, and usually fins and a skin covered in scales: includes the sharks and rays (class Chondrichthyes : cartilaginous fishes) and the teleosts, lungfish, etc (class Osteichthyes : bony fishes)
What does fish mean in biology?
Listen to pronunciation. A technique used to identify the presence of specific chromosomes or chromosomal regions through hybridization (attachment) of fluorescently-labeled DNA probes to denatured chromosomal DNA.
What is a fish answer?
Fish are cold-blooded, gill-bearing aquatic organisms that lack limbs. Fish have great diversity, including armoured fish, jawless fish, lobe-finned fish, cartilaginous fish, and ray-finned fish. In the taxonomic hierarchy, fishes belong to the kingdom Animalia, phylum Chordata and class Pisces.
What is the simple definition of a fish? – Related Questions
What are 5 characteristics of fish?
Characteristic of fish
- Ectothermic.
- Lateral line.
- Two chambered heart.
- Gills used for respiration.
- No external ears.
- No eye lids.
What is fish introduction?
Fish (in general) is a cold-blooded aquatic organism that breathes with gills and swims with fins; they are categorized as Finfish and Shellfish. Finfish are cold-blooded aquatic vertebrates that have gills, fins with rays, and scales covering the body.
What is a fish for kids?
Fish are vertebrates (vertebrates have backbones) that live in water. They breathe using special organs called gills.
What is fish class1?
Fish are animals that are found only underwater. They cannot survive without water. They breathe oxygen present in the water with the help of gills. They are found in various water bodies such as rivers, ponds, oceans, and seas. There are almost 29,000 species of fish all over the world that scientists have discovered.
What are fish for Class 4?
A fish is considered as an aquatic animal. It only lives underwater. There are almost 20,000 species of fish. It also includes the groups of jawless fish, sharks, bony fish, and many more with different shapes, sizes, and colors.
Which one is a fish?
To be a true fish, a fish must have fins, gills, and a vertebra. Dogfish are vertebrate (with backbone) that belongs to the phylum Chordata and are classified under subclass Chondrichthyes in class Pisces. Dogfish are cartilaginous fishes due to the presence of cartilaginous skeleton.
What are 10 characteristics of a fish?
Top 10 Facts About Fish
- There are over 30,000 species of fish.
- Fish breathe through their gills.
- Most fish don’t have eyelids.
- Fish are cold-blooded!
- Scales help fish to swim.
- Fish are vertebrate animals.
- Fish are speedy!
- Fish talk to each other!
Is every animal a fish?
However, according to the definition above, all mammals, including cetaceans like whales and dolphins, are not fish.
Do fishes sleep?
While fish do not sleep in the same way that land mammals sleep, most fish do rest. Research shows that fish may reduce their activity and metabolism while remaining alert to danger. Some fish float in place, some wedge themselves into a secure spot in the mud or coral, and some even locate a suitable nest.
Can fish see in dark?
Fish living in the deep sea manage to navigate in complete darkness. It’s not strictly ‘seeing’ but fish have rows of pressure-sensitive organs running down each side of their body called the lateral line, which allows them to sense nearby animals from the pressure changes in the water.
Can fishes feel pain?
“Fish do feel pain. It’s likely different from what humans feel, but it is still a kind of pain.” At the anatomical level, fish have neurons known as nociceptors, which detect potential harm, such as high temperatures, intense pressure, and caustic chemicals.
Do fish have feelings?
Nerves, brain structure, brain chemistry and behaviour – all evidence indicates that, to varying degrees, fish can feel pain, fear and psychological stress.
Does fish have blood?
Fish have blood and it is red in color. fish have a red pigment called hemoglobin that is responsible for the red color. Similar to humans, fish have a circulatory system with blood and a heart that acts as a pump. A fish’s whole body weight is around 10% of its blood.
Do fish get lonely?
In captivity, it’s strongly recommended that they should be kept at least in pairs, to provide companionship. If you watch fish in a tank, you’ll see that they regularly engage with other fish. It’s thought that solitary fish, much like solitary humans, may begin to suffer from depression and lethargy.
Can fishes cry?
No, fishes can’t cry and can’t produce tears.
It is often thought that fish may lack the limbic system, but in reality, fishes do have a limbic system, but they lack the biological machinery to produce tears.
Do fishes get happy?
Swimming actively
Most pet fish that are happy and comfortable spend less time hiding and more time moving around. And just like humans, happy fish usually have a vibrant glow which is a sign of good health.