2 pics giving closer view of a common species,via snorkel or shallow dive.
IDing the greenish algae in the background
Cottage by the Sea dive
Reasonably common on some parts of the low calcrete substrate close to shore on the northern side of Syngnathid Hotspot. (Which is an area where once grew mainly seagrasses in my youth and up till very roughly 3 decades ago).
Beach washed near mouth of Yankalilla River
Beach washed and has lost much pigment so it looks green to brown.
Beach washed near mouth of Bungala River
Beach washed near mouth of Bungala River
Beach washed near mouth of Bungala River
Beach washed
Multiple species In the photo I think. Very tall specimens