Consider obsoleting this adding the reason "does not exist in teleosts" and adding consider link to "optic placode"
"The lens of zebrafish (and other teleosts) forms from delamination of cells from the lens placode; thus, there is no formation of a hollow lens vesi- cle, in contrast to the situation in mammals and birds (Glass and Dahm, 2004)."
In contrast to mammals or avians, the earliest stages of lens development in zebrafish occur without the formation of a lens vesicle.9–12
Developmental biology of Teleost fishes
By Yvette W. Kunz
states the teleost eye develops as a solid mass and the equivalent of the optic vesicle is the optic lobe
[but this seems really problematic to me, as this term is already used for somethng else...]