eelgrass; Zostera marina
A marine flowering plant found in shallow coastal waters; the scientific name is Zostera marina.
Eelgrass is a seagrass that grows in shallow seas.
In this bay, eelgrass beds are spreading.
Katakana spelling is common for this plant name; usually written in kana.
Kanji form is rare; the plant is almost always written in kana.
The name likely derives from 甘い (amai, 'sweet') + 藻 (mo, 'algae/seaweed'), but the exact origin is uncertain.