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Many aquatic animals have developed gills for respiration which are specifically adapted to their function. In fish, for example, they have: A large surface area to allow as much oxygen to enter the gills as possible because more of the gas comes into contact with the membrane
Aerial respiration is the 'gulping' of air at the surface of water to directly extract oxygen from the atmosphere. Aerial respiration evolved in fish that were exposed to more frequent hypoxia; also, species that engage in aerial respiration tend to be more hypoxia tolerant than those which do not air-breath during the hypoxia. [53]
Aquatic respiration – Process whereby an aquatic animal obtains oxygen from water; Artificial gills (human) – Hypothetical devices to extract oxygen from water; Book lung – Type of lung commonly found in arachnids; Fish gill – Organ that allows fish to breathe underwater
Cutaneous respiration is more important in species that breathe air, such as mudskippers and reedfish, and in such species can account for nearly half the total respiration. [15] Fish from multiple groups can live out of the water for extended time periods. Air breathing fish can be divided into obligate air breathers and facultative air
The gills' large surface ... Obligate ram ventilation is also true of some pelagic bony fish species. [17] The respiration ... As with many aquatic animals, most fish ...
The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ in bony fish (but not cartilaginous fish [1]) that functions to modulate buoyancy, and thus allowing the fish to stay at desired water depth without having to maintain lift via swimming, which expends more energy. [2]
They have the lowest aquatic respiration of all extant lungfish species, [25] and their gills are greatly reduced and essentially non-functional in the adults. [26] Marbled lungfish. The marbled lungfish, Protopterus aethiopicus, is found in Africa. The marbled lungfish is smooth, elongated, and cylindrical with deeply embedded scales. The tail ...
Astyanax abramis is a small freshwater fish from the inland rivers of South America. It is plentiful in almost the entire continent, with a habitat including the La Plata, upper Amazon, and Meta River basins. The body shape is subrhomboidal (somewhat rhomboidal) and laterally compressed, and the scales are largely silver, with a blue or green ...