scraps of seaweed; death at sea (metaphor)
marimo (variety of algae, Cladophora aegagropila); round green algae; Cladophora ball; lake ball; moss ball
hydrilla (species of aquatic plant, Hydrilla verticillata); Papenfussiella kuromo (species of brown algae)
seaweed salt; salt from burning seaweed
seaweed bed; seaweed forest
Eurasian water milfoil (Myriophyllum spicatum); aquatic plants such as hornwort that are commonly used in goldfish tanks, etc.
shed skin (of a snake, insect, etc.); ecdysis
common hornwort (Ceratophyllum demersum); Analipus japonicus (species of brown alga)
Closterium (genus of algae)
washed-up seaweed; stranded seaweed
waterweed (any aquatic plant of genus Elodea, esp. common waterweed, Elodea canadensis)
Phyllospadix iwatensis (species of seagrass)
whorl-leaf water milfoil (Myriophyllum verticillatum)
Ochromonas vischeri (species of golden alga)
Chaetomorpha algae; Chaeto; nostoc
star duckweed (Lemna trisulcata); ivy duckweed
stonewort (esp. Braun's stonewort, Chara braunii)
floating watermoss (Salvinia natans)
dinoflagellate of genus Ceratium
small pondweed (Potamogeton pusillus)
spiny water nymph (Najas marina); spiny naiad; holly-leaved naiad