Sound is the energy of a pressure wave through air, water, etc. Water is denser than air, so that fish do not need the large external ear of say, a fox. Taste buds are chemoreceptors that recognize four taste sensations of sweet, sour, bitter, and salty. While mammalian taste buds are on the tongue, other vertebrates can have their receptors elsewhere in the mouth. The photoreceptors are rod and cone cells.
Rod cells pick up dim light, but cone cells pick up bright light and are the ones involved in color.