Bulls were common livestock in much of the ancient world; this figure comes from what is now Syria. As for it's exact purpose, I don't really have an idea, but perhaps experts of that particular place or time do. It's kinda cute though.

These dolphins are painted on the walls of the famous palace in Knossos. First built around 1800 BCE, it was abandoned with the fall of Minoan civilisation that still remains a historical mystery, generating endless speculation (and spurious conspiracy theories).

This vase is in the earlier black-figured tradition of Ancient Greek pottery, distinguished by the inverted red-figured style by having black figures on a red background. It depicts a mythological chimera, or fusion between multiple beasts.

This boat is part of a fleet of several accomanying the chancellor Meketre as part of his voyage to the Ancient Egyptian afterlife. It is heading to the city of Abdju (more commonly known by its Greek name Abydos), where the god Osiris was said to be located. Burying oneself close to Osiris was an important part of gaining access to the afterlife, and these figurines depicting the ritualistic voyage were included in Meketre's tomb. This one in particular contains priests venerating a statue of Meketre, located under the canopy.

The Myceneans were the predecessors of the more well known Ancient Greek civilisation. In my opinion, though, their art is cooler.