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The Asian swamp eel (Monopterus albus), also known as rice eel, ricefield eel, rice paddy eel [3] or white rice-field eel, [1] is a commercially important air-breathing species of fish in the family Synbranchidae. It occurs in East and Southeast Asia, where it is commonly sold and eaten throughout the region.
The marbled swamp eel, Synbranchus marmoratus, has been recorded at up to 150 cm (59 in) in length, [5] while the Bombay swamp eel, Monopterus indicus, reaches no more than 8.5 cm (3.3 in). Swamp eels are almost entirely finless; the pectoral and pelvic fins are absent, the dorsal and anal fins are vestigial, reduced to rayless ridges, and the ...
The marbled swamp eel has an elongated cylindrical body and can grow to a maximum length of about 150 cm (60 in), although a more normal adult length is 50 cm (20 in). The dorsal and anal fins are vestigial and the paired pectoral and pelvic fins are missing altogether. [2]
Monopterus is a genus of swamp eels native to Asia. [2] They live in various freshwater habitats and some have a fossorial lifestyle. [3] Species.
Synbranchus is a genus of swamp eels native to Central and South America. Species. There are currently three recognized species in this genus: [3]
Most eels live in the shallow waters of the ocean and burrow into sand, mud, or amongst rocks. A majority of eel species are nocturnal and thus are rarely seen. Sometimes, they are seen living together in holes, or "eel pits". Some species of eels live in deeper water on the continental shelves and over the slopes deep as 4,000 metres (13,000 ft).
All species in this genus were formerly classified in Monopterus, but a 2020 study found them to represent a distinct monophyletic clade from Monopterus.Due to this, the genus name Ophichthys, previously coined by William Swainson, was revived to be used for them.
In some parts of Asia, swamp eels and one species of spiny eel, Mastacembelus erythrotaenia, are valued as food and sometimes are kept in ponds or rice fields. Except for a few mastacembelids, they are rarely seen in home aquaria. The fish have numerous sharp dorsal spines and belly thorns which, together with its sliminess make them extremely ...