I'll hazard a guess that Pepper Dulse, a ruby red seaweed with branching fern-like fronds, was a favourite with Victorian ladies who liked to add seaweed to their 'fern-mania' collections.
Some swam and then climbed upon seaweed, clad rocks.
|Coco kept look out.|
|Meanwhile the Seaweed lady waded out to her island|
|and harvested seaweeds.|
|Notice the colour reaction of pepper dulse in albumen, the yolk remains red.|