Do tides make sounds?

Never daunted, or missing an opportunity to waggle his finger at someone, Mark lets Mr. Grumpy (off camera) know that he needn’t worry… that he’s an expert in matters pertaining to wildlife…

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But what’s up with the lady in panel three?  Is this the angry panel?  She was just crying 30 seconds ago… Is she mad that Cherry’s swimsuit is from the same dye lot as hers?

But I repeat… can one hear the tide coming in?  And if tides are hours apart, wouldn’t that whale be suffocated under its own weight by now?  And I am sure that it didn’t occur to any of the other humans, before the Trails showed up, that they might work together to get the whale back in the ocean…  where it will probably lose its way again and get itself beached outside of the prying eyes and meddling hands of random (really) white folks on vacation…