If the Earth is more than 70% water, then how come the most intelligent life forms are on land?

Can't water be a suitable habitat for intelligent life?

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The habitat of mankind was once the sea; their companions, dolphins. Evolution led us to the land, revolution shall bury us in it.

Dobsdobs · 46-50, M

@EugenieLaBorgia you mean homo spaiens evolved in the oceans? Darwin;s turning in his grave you know!