44 Nucella lapillus. Hypobranchial gland exposed to light and air.

44 Nucella lapillus. Hypobranchial gland exposed to light and air.

Colour changes in exposed gland (centres of images) and surrounding tissue where gland’s mucus has spread. Change from white to yellow is rapid, occurring during dissection. Images taken 2h, 3h, 6h and 11h after initial exposure.