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Typically, the eels are chopped (shucked) into rounds and boiled in water and vinegar to make a fish stock with nutmeg and lemon juice, before being allowed to cool. The eel is a naturally gelatinous fish, with the cooking process releasing proteins, like collagen, into the liquid, which solidify upon cooling to form a jelly, though gelatin may ...
Bubble nests, also called foam nests, are created by some fish and frog species as floating masses of bubbles blown with an oral secretion, saliva bubbles, and occasionally aquatic plants. Fish that build and guard bubble nests are known as aphrophils.