a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

an aquatic shellfish (generally limited to mollusks with calcareous shells such as clams or snails, and excluding crustaceans such as shrimp or crabs)

a trough shell (bivalve), Mactra chinensis Philippi

delicious, tasty, something that tastes good

delicious, good, tasty

a univalve

shell / shellfish

Babylonia japonica: the Japanese babylon or Japanese ivory shell

seed / plant, sow / class, kind, variety / (taxonomy) species

a seed / a kind, type, sort, class, or category / (taxonomy) a species