Nudibranch Eggs (possibly Hypselodoris sp.)
After their freaky hermaphroditic mutual sperm swap, both nudibranchs lay seperate egg ribbons. In most cases these are laid directly on the species food source. The shape, colour and design is often characteristic of the specific group or Family.
Most are toxic to deter predation. But then we don’t really expect any less from nudibranchs, do we?