Hippocampus

In the brain, the hippocampus is the center for memory. This is where memories are first consolidated and stored, where associations are formed and activation of a few cells in the pattern can evoke the whole memory.

The Latin root for the word hippocampus is sea horse.

So, naturally:

The brain, languages, and puns (notice the brain coral?) all together in one beautiful shirt? I would've bought this, but unfortunately it didn't make it past Honorable Mention status on Woot.