Noritaka Hirohashi

The paper shows that cuttlefish males produce dimorphic sperm despite lacking insemination-site dimorphism, with smaller males having longer sperm flagella and greater within-individual variation.

This study reveals that three photophore types in Watasenia scintillans synchronously and asynchronously produce counterillumination, with green photophores also functioning in darkness, suggesting roles in crypsis and conspecific signaling.