Long Tide, No See

Listen up, chucklehead! This joke is so simple even YOU should get it. It's a play on words. "Long time, no see" is a common saying, but the joke replaces "time" with "tide" because, you know, the fish is talking about the ocean tide, which is kinda beach-related. And guess what Einstein, tides are the daily rise and fall of Earth's oceans, caused by the moon's gravity! Now go ask your mommy for a juice box.