Why did the coral feel overwhelmed?

This joke is a perfect example of wordplay, specifically a pun, which relies on the clever use of a word or phrase that has two different meanings. The humor here hinges on the word "pressure." In one sense, it refers to the immense physical force exerted by the weight of the ocean above, a constant reality for coral (Deals) living deep underwater. In the other, more relatable sense, it means feeling stressed, overwhelmed, or burdened by expectations, much like a person might feel.

In the real world, coral reefs are vital underwater ecosystems, and the coral itself is indeed subject to significant hydrostatic pressure from the surrounding water column, especially at greater depths. While corals typically thrive in shallower, sunlit waters, they can be found at various depths where the physical pressure of the water (Review) is a fundamental aspect of their environment. The joke brilliantly takes this scientific fact and reinterprets it through a human emotional lens, imagining the coral feeling the weight of its entire community, the reef, in a metaphorical way.

So, the joke's charm comes from this delightful double entendre, combining the literal deep-sea conditions with a very human feeling of being overwhelmed. It's a lighthearted nod to both the wonders of ocean life and the universal experience of stress.