Rear fin of a squid embryo. DiI.
The rear fin of a squid embryo that has been labeled with DiIC18(3) (DiI; D282, D3911), showing selective staining of a population of ciliated sensory neurons whose cell bodies line the periphery of the fin. The dye was applied by soaking the embryos in a solution; no injection was used. Image contributed by Rachel Fink, Mount Holyoke College.