sea lettuce

noun

sea lettuce

any of various green seaweeds of the genus Ulva, which have edible wavy translucent fronds

First recorded in 1660–70

Some of the more popular kinds include sea lettuce, Irish moss, bladderwrack, dulse, and feather boa kelp.

Ulva, or sea-lettuce, is to be found in abundance in all our small bays and inlets at low tide.

The so-called “sea lettuce” is of a bright grass green color, forming a large leaf like expansion.

We worked our way at times into small bays where green sea-lettuce lay in the shallow water in masses.

Among the marine forms related to these may be mentioned the sea lettuce (Ulva), shown in Figure 15.

There is sea-lettuce in the water, so there must be enough air.

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