CRUMENAL ORGAN
bilaterally flattened pair of somewhat angular pouches or purses involving the last two gill arches and the anterior oesophagus whose posterior origin is supported by the fifth ceratobranchial and the posterodorsal tip of the fifth epibranchial (bones of the gill arch) which are united by special accessory cartilage in the Argentinoidei (Argentinoidea and Alepocephaloidea). Food particles are trapped dorsally in the pouches by large interlocking toothed gill rakers