AFOG staining of an adult female zebrafish that is egg-bound. You can see the cloaca on the left with lots of collagen (blue) and villi(?). On the right, you can spot oocytes at various stages of maturation. Captured on an Evident Slide Scanner.

The #zebrafish cloaca is bizarre and beautiful, as spotted looking for something else! Here it is in an adult female stained for collagen (in blue). I should probably mark this as sensitive content, right? 🤦 #FishNotPeople

Spoiler alert: “In both [Alfaro] species, males adopt a unique posture above females and initiate physical contact. A. cultratus males rub the tops of females' heads with their pelvic fins, whereas A. huberi males touch females' chins with the gonopodium, a modified anal fin.” #FishNotPeople 🐠 🧪