exterilium
a detached and trailing gut with many cirri and the anal opening on the dorsal edge found in larvae of some species, possibly of Brotulidae (Fraser and Smith, 1974)

Dictionary of ichthyology. 2009.

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  • larval period — the time from the beginning of exogenous nutrition (feeding externally) until the formation or ossification of the axial skeleton and until the undifferentiated median fin fold is differentiated or no longer apparent. Some embryonic organs… …   Dictionary of ichthyology

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