A fish is an animal that lives only in the water, whereas a reptile lives in both land and water. A fish is an aquatic vertebrate that is cold blooded or ectothermic. They have paired or unpaired fins, while reptiles have small legs for limbs. …
Why fish is not reptile?
Why are fishes not reptile? – Quora. And those eggs are laid on land (amphibians and fish both lay their soft, jelly-like eggs in the water). This is why fish are not reptiles – they do not have a dry, scaly skin and they lay their eggs in the water.
Are fish considered reptiles?
Reptiles cannot breathe underwater, and lay hard shelled eggs on land. Fish ‘breathe’ underwater via their gills, and lay soft shelled eggs underwater. There are exceptions, but there are a lot of similarities that remain. So no, fish are not reptiles, but reptiles are – in a very long and roundabout way – partly fish.
How is the skin of fish similar to and different from that of a reptile?
Unlike reptiles, the scales of bony fish are made of enamel and dentine (like teeth) and they can be detached individually from the skin. … Their tough skin is covered with placoid scales – small, spiny, irregular-shaped scales called dermal denticles (“skin teeth”). This gives them a sandpaper-like feel.
Are the scales on fish and reptiles the same?
Fish scales are dermally derived, specifically in the mesoderm. This fact distinguishes them from reptile scales paleontologically. Genetically, the same genes involved in tooth and hair development in mammals are also involved in scale development.
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.
Are fish and snakes related?
However, fish scales and reptile scales are not homologous — meaning that they do not arise from the same embryonic tissues. Fish have scales that arise from dermal — bony — tissue and have a somewhat similar composition to bone. … These scales form from the epidermis, somewhat like those of snakes and lizards do.
What animal class is a fish?
fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.
What animal is an Ectotherm?
biology. Give Feedback External Websites. Ectotherm, any so-called cold-blooded animal—that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates.
Is snake a vertebrate?
Snakes belong to the vertebrates, along with all other reptiles and amphibians, mammals, birds, and fish. All these animals have an inner skeleton. Bones give structure and strength to bodies.
What are the similarities and differences of fish?
All fish share two traits: they live in water and they have a backbone—they are vertebrates. Apart from these similarities, however, many of the species in this group differ markedly from one another. Fin fish like salmon have gills, are covered in scales, and reproduce by laying eggs.
What do scales do in fish?
Many fish have an outer covering of scales. Scales protect fish, much like a suit of armor. All fish have a slimy covering of mucus. This substance allows the fish to swim through the water with very little drag and also makes it difficult for other organism to attach to the fish.
Do fish have moist skin?
Fishes are finned aquatic vertebrates. They have scales, an interior skeleton, and breathe by passing water over their gills (aquatic respiration). … They have smooth, moist skin with no scales, feathers, or hair.
What type of fish is a shark?
Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish. The classification of this type of fish is “elasmobranch.” This category also includes rays, sawfish, and skates.
Can a fish hear?
Fish hear, but their “ears” are on the inside. Bony fishes detect vibrations through their “earstones” called otoliths. Both people and fish use parts of their ears to help them with balance.
Why is snake covered with a dry scale?
A scale protects the body of the snake, aids it in locomotion, allows moisture to be retained within, alters the surface characteristics such as roughness to aid in camouflage, and in some cases even aids in prey capture (such as Acrochordus).