title: Morphological indications for endocrine activity in the pineal organ of teleost fishes.
mesh_terms: D000818:Animals; D003624:Darkness; D005399:Fishes / Q000033:anatomy & histology / Q000502:physiology*; D008055:Lipids; D008247:Lysosomes; D010870:Pineal Gland / Q000033:anatomy & histology / Q000378:metabolism* / Q000648:ultrastructure
chemical_list: D008055:Lipids