Identificaciones de acastelein

This is what's fun about naturalizing with experts: I would have called this slug Flabellina trilineata, been glad of meeting an old aquaintance, and moved on. But Jeff's kids found some, and Jeff noticed the smooth rhinophores and light cnidosacs, which would apparently suggest Flabellina bertschi instead, a southern species more commonly encountered from Baja to Costa Rica. Still waiting on a definitive ID, but cool!