The relationship between the lungfishes and amphibians is that the lung fishes have lungs unlike amphibians who don't because they depend on water
Most evolutionary scientists today do not think that amphibians evolved from the lungfish. They do share some characteristics, but the lungfish has no hint of legs.
Amphibians are believed to have evolved from the lineage of lungfish during the Devonian period. This transition from aquatic to terrestrial life marked a significant step in the evolution of vertebrates.
It begins with rhipidistian lungfish of the orodivician, and progresses to sarcopterygian lungfish of the silurian. By the devonian there is a "fishapod" known as Tiktaalik. In the carboniferous we find acanthostega and a variety of other amphibians. Finally, in the permian, we discover pelycosaurs and sail backed reptiles--creatures similar in form to the earlier amphibians, but which we do not classify as amphibians. From there terrestrial vertebrate evolution takes off into the triassic with lots of speciation.
Genetic analysis suggests that the coelacanth is the closest living relative of amphibians due to shared genetic traits and similarities in their morphology. Additionally, both coelacanths and amphibians possess certain anatomical features, such as similar skull structures, that indicate a close evolutionary relationship.
The relationship of amphibians and insects is a predator-prey relationship. Amphibians hunt insects for food. As such, they help to control insect populations.
Lungfish and amphibians share several key characteristics, including a dual respiratory system that allows them to breathe both through gills and lungs, enabling them to thrive in aquatic and terrestrial environments. They both exhibit a life cycle that includes an aquatic larval stage and a metamorphosis into a more terrestrial adult form. Additionally, both groups possess a similar skeletal structure, featuring paired limbs, which reflects their evolutionary relationship as they adapted to life on land.
The four types of lungfish are the south American lungfish, the African lungfish
You cannot differentiate between animals and amphibians because amphibians ARE animals.
Lungfish have 2 lungs but the Australian lungfish has 1.
Lungfish - band - was created in 1988.
Coldblooded vertebrates include the fish, the amphibians and the reptiles. There are a actually fish with lungs, lungfish. Some species of lungfish have more or less working gills, but most species need to breath using their lung(s) even when in the water. Amphibians all have a juvenile water-breathing form, no exceptions to my knowledge. Their adult form has lungs. Reptiles (crocodiles, snakes, lizards, turtles) are the group you are probably looking for. These breath using their lungs.
Lungfish can breathe through air.