Significance to humans
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 mas-tacembelids, they are rarely seen in home aquaria.
1. Fire eel (Mastacembelus erythrotaenia); 2. Swamp eel (Monopterus albus); 3. Marbled swamp eel (Synbranchus marmoratus); 4. Blind cave eel (Ophisternon candidum). (Illustration by John Megahan)
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