#kelp-anatomy

2 articles

Giant kelp fronds rising toward the sunlit surface, each blade wearing a small round pneumatocyst float, backlit in teal-blue coastal water

Why Kelp Has Balloons: The Physics and Biology of Pneumatocysts

Those bulbs along a kelp frond are gas bladders called pneumatocysts. Here's what's inside them, how kelp inflates them, and why a forest floats.

Dr. Theo Nakamura · September 26, 2026

Science7 min read

Holdfast Biology: How Kelp Grips Rock Without Roots

Kelp has no true roots — its holdfast is a branching biological anchor built for storms. Explore holdfast anatomy, how kelp really feeds, and its hidden biodiversity.

Dr. Theo Nakamura · September 25, 2026

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