My go to quick-keto method is a coconut oil and cream fast. Basically just coffee, cream, and coconut oil for a day, top the day off with a bout of heavy weights before bed, tons of water, and I'm in ketosis in a day or 2.
Some well known gastropods, which are mollusks, are snails and slugs, and they exhibit what is known as BILATERAL SYMMETRY. The only other kind of symmetry that exists in the animal kingdom, with the exception of colonial species such as the sponge, is RADIAL SYMMETRY.
Some species, such as native slugs, have soft, jelly-like eggs, while flax snails and kauri snails have eggs with a hard, calcified shell. The eggs can be quite large - up to about 13 mm in diameter in giant snails. The eggs develop for some time; the young snail and slug hatchlings resemble adults.