What is the five senses are dolphins believed not to possess?

Dolphins are believed to lack the sense of taste in the way humans experience it, as they have few taste buds and do not rely on taste for food selection. Additionally, they do not possess the sense of smell, as they lack olfactory bulbs and rely primarily on echolocation and other senses for navigation and hunting. While they have well-developed vision and hearing, their ability to perceive certain stimuli differs from that of terrestrial animals.