Term Name:	fin fold actinotrichium
Synonyms:	fin fold actinotrichia, median fin fold actinotrichium
Definition:	Portion of tissue which is a slender, horny, flexible, unsegmented fibril, which strengthens the embryonic fin fold. Actinotrichia are translucent, exhibit birefringence (double refraction) and are composed of the scleroprotein elastoidine.
Appears at:	Pharyngula:Prim-5 (24.0h-30.0h)
Evident until:	Hatching:Pec-fin (60.0h-72.0h)
Ontology:	Anatomy Ontology [ZFA:0000089]

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