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Eel
Eels are ray-finned fish belonging to the order Anguilliformes (), which consists of eight suborders, 20 families, 164 genera, and about 1000 species. Eels undergo considerable development from the early larval stage to the eventual adult stage and are usually predators. The term "eel" is also used for some other eel-shaped fish, such as electric eels (genus ''Electrophorus''), swamp eels (order Synbranchiformes), and deep-sea spiny eels (family Notacanthidae). However, these other clades, with the exception of deep-sea spiny eels, whose order Notacanthiformes is the sister clade to true eels, evolved their eel-like shapes independently from the true eels. As a main rule, most eels are marine. Exceptions are the catadromous genus ''Anguilla'' and the freshwater moray, which spend most of their life in freshwater, the anadromous rice-paddy eel, which spawns in freshwater, and the freshwater snake eel Stictorhinus. Description Eels are elongated fish, ranging in length fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anguillidae
The Anguillidae are a family of ray-finned fish that contains the freshwater eels. All the extant species and six subspecies in this family are in the genus ''Anguilla'', and are elongated fish of snake-like bodies, with long dorsal, caudal and anal fins forming a continuous fringe. They are catadromous, spending their adult lives in freshwater, but migrating to the ocean to spawn. Eels are an important food fish and some species are now farm-raised, but not bred in captivity. Many populations in the wild are now threatened, and Seafood Watch recommend consumers avoid eating anguillid eels. Physical description Adult freshwater eels are elongated with tubelike, snake-shaped bodies. They have large, pointed heads and their dorsal fins are usually continuous with their caudal and anal fins, to form a fringe lining the posterior end of their bodies. They have relatively well developed eyes and pectoral fins compared to saltwater eels that they use to navigate and maneuver thro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Eel
The electric eels are a genus, ''Electrophorus'', of neotropical freshwater fish from South America in the family Gymnotidae, of which they are the only members of the subfamily Electrophorinae. They are known for their electric fish, ability to stun their prey by generating electricity, delivering shocks at up to 860 volts. Their electrical capabilities were first studied in 1775, contributing to the invention of the electric battery in 1800. Despite their name, electric eels are not closely related to the true eels (Anguilliformes) but are members of the electroreceptive knifefish Order (biology), order Gymnotiformes. This order is more closely related to catfish. In 2019, electric eels were split into three species: for more than two centuries before that, the genus was believed to be monotypic, containing only ''Electrophorus electricus.'' They are nocturnal, obligate air-breathing animals, with poor vision complemented by Electroreception and electrogenesis#Electrolocati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anguilla Dieffenbachii
The New Zealand longfin eel (''Anguilla dieffenbachii'') is a species of freshwater eel that is endemic to New Zealand. It is the largest freshwater eel in New Zealand and the only endemic species – the other eels found in New Zealand are the native shortfin eel (''Anguilla australis''), also found in Australia, and the naturally introduced Australian longfin eel (''Anguilla reinhardtii''). Longfin eels are long-lived, migrating to the Pacific Ocean near Tonga to breed at the end of their lives. They are good climbers as juveniles and so are found in streams and lakes a long way inland. An important traditional food source for Māori (who name them ), longfin eel numbers are declining and they are classified as endangered, but over one hundred tonnes are still commercially fished each year. Description The easiest way to identify the longfin eel is by the length of its fins: the dorsal (top) fin is about two-thirds the length of the body and starts significantly further to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnothorax Polyuranodon
''Gymnothorax polyuranodon'', commonly known as the freshwater moray, is a species of moray eel that is native to the Indo-Pacific region, including Sri Lanka, the Philippines, Indonesia, Papua New Guinea, the northern coastline of Australia, and various islands in the western Pacific. Other common names include the many-toothed moray, spotted freshwater moray, blackspotted moray, freshwater leopard moray, and freshwater tiger moray. Description ''Gymnothorax polyuranodon'' was named by Pieter Bleeker in 1853. The species can reach a maximum length of 1.5 metres (4.9 feet), but it is rarely seen larger than 1 metre (3 feet). Its colouration is yellow or light tan, covered with dark brown spots and blotches. The freshwater moray has very small teeth in proportion to the size of its head, and, like all moray eels, is carnivorous. Its diet consists almost entirely of fish, and occasionally shrimp, bivalves, and worms, and it prefers to eat live food. Like many moray eels, it has poor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conger Conger Gervais
''Conger'' ( ) is a genus of marine congrid eels. It includes some of the largest types of eels, ranging up to or more in length, in the case of the European conger. Large congers have often been observed by divers during the day in parts of the Mediterranean Sea, and both European and American congers are sometimes caught by fishermen along the European and North American Atlantic coasts. The life histories of most conger eels are poorly known. Based on collections of their small leptocephalus larvae, the American conger eel has been found to spawn in the southwestern Sargasso Sea, close to the spawning areas of the Atlantic freshwater eels. "Conger" or "conger eel" is sometimes included in the common names of species of the family Congridae, including members of this genus. Description Congers have wide mouths with sturdy teeth, usually a variant of gray or black in coloration. They have no scales. Their body weight can reach over . Species * †'' Conger brevisulcus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synbranchiformes
Synbranchiformes, often called swamp eels, though that name can also refer specifically to Synbranchidae, is an order of ray-finned fishes that are eel-like but have spiny rays, indicating that they belong to the superorder Acanthopterygii. Taxonomy No synbrachiform fossil is known. The Mastacembeloidei were removed from the Perciformes and added to the Synbranchiformes after a phylogenetic analysis by Johnson and Patterson. These authors consider the Synbranchiformes to be part of a monophyletic group called Smegmamorpha, also containing Mugilimorpha, Atherinomorpha, Gasterosteiformes, and Elassomatidae. Later authors have proposed that the Synbranchiformes along with the Anabantiformes, Carangiformes, Istiophoriformes and Pleuronectiformes form a sister clade to the Ovalentaria which has been called the "Carangimorpharia" but in the 5th Edition of Fishes of the World this clade remained unnamed and unranked. There are a total of about 99 species divided over 15 gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnothorax Isingteena - Spotted Moray Eel - Aug 29 2016
''Gymnothorax'' is a genus of fish in the family Muraenidae found in Atlantic, Indian, and Pacific Oceans. With more than 120 species, it the most speciose genus of moray eels. notes that ''Gymnothorax'' as currently recognized is polyphyletic, but cautioned that comparative studies are needed before action is taken to resurrect generic synonyms of ''Gymnothorax''. Description Species in this genus are slender (most skinny one being '' Gymnothorax gracilicauda'' )and can get up to 6-8 feet. Like all moray eels have pharyngeal jaws. Species Both FishBase and World Register of Marine Species recognize a total of 128 valid species in the genus. However, each database includes three species that the other does not list, which are noted in the list below. * '' Gymnothorax afer'' Bloch, 1795 (Dark moray) * '' Gymnothorax albimarginatus'' ( Temminck & Schlegel, 1846) (White-margin moray) *'' Gymnothorax andamanensis'' * '' Gymnothorax angusticauda'' ( M. C. W. Weber ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are predominan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish ( Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish ( Chondrichthyes) and jawless fish ( Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectoral Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish aquatic locomotion, swim. Apart from the tail or caudal fin, fish fins have no direct connection with the vertebral column, back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bone, bony spine (zoology), spines or ray (fish fin anatomy), rays covered by a thin stretch of fish scale, scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central limb bud, bud supported by appendicular skeleton, jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy "flipper (anatomy), flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rice-paddy Eel
The rice-paddy eel (''Pisodonophis boro''; also known commonly as the Bengal's snake-eel, the estuary snake eel, or the snake eel) is an eel in the family Ophichthidae (worm-snake eels).''Pisodonophis boro'' at www.fishbase.org. It was described by in 1822, originally in the genus '' Ophisurus''.Hamilton, F., 1822 ef. 2031''An account of the fishes found in the river Ganges and its branches.'' Edinburgh & London. i-vii + 1-405, Pls. 1-39. It is a |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
