Common name: Neptune’s Necklace
Scientific name: Hormosiri banksii
Date observed: 25th March 2017
Time of day observed: Morning
Size: Thallus length to 300 mm
Location: Windang Island
Zone: Low intertidal rock pools and gutters
Number encountered: Abundant
Interactions within species:
Several thalli grow from a single foot. These algae form scattered clumps in rock pools and low-lying gutters. When not submerged they form dense mats.
Interactions with other species:
Young Zebra Top Snails sheltered amongst the beads. Suspect this helps prevent predation by seastars and crabs.
This brown alga has a thallus made of air bladders. When submerged, the bladders float, lifting the thalli into shallower water with more light available for photosynthesis