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Fish anatomy is the study of the form or morphology of fish. ... p. 219 In freshwater fish the bladder is a key site of absorption for many major ions ...
Freshwater fish. Tench are common freshwater fish throughout temperate Eurasia. Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference ...
G. Cuvier, 1831. Pterophyllum is a small genus of freshwater fish from the family Cichlidae known to most aquarists as angelfish. All Pterophyllum species originate from the Amazon Basin, Orinoco Basin and various rivers in the Guiana Shield in tropical South America. The three species of Pterophyllum are unusually shaped for cichlids being ...
The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include Haikouichthys.
Coelacanths are a part of the cladeSarcopterygii, or the lobe-finned fishes. Externally, several characteristics distinguish coelacanths from other lobe-finned fish. They possess a three-lobed caudal fin, also called a trilobate fin or a diphycercal tail.
General morphology of the American paddlefish Paddlefish ram suspension-feeding zooplankton in aquarium. American paddlefish are among the largest and longest-lived freshwater fishes in North America. [26] They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. [27]
Freshwater bivalves have a simple morphology that varies among taxa, and are distributed around most regions of the world. Freshwater bivalve species vary greatly in size. Some pea clams ( genus Pisidium ) have an adult size of only 3 mm (0.12 in).
Heterophyes heterophyes. Heterophyes heterophyes, or the intestinal fish fluke, was discovered by Theodor Maximaillian Bilharz in 1851. This parasite was found during an autopsy of an Egyptian mummy. [1] H. heterophyes is found in the Middle East, West Europe and Africa. [2] They use different species to complete their complex lifestyle.