8 items (100 per page)

  • Cystophora torulosa

    01 Jun 2018-38.4,145.1Leuba Ridgway

    This attractive sea weed had a zig-zagging tough central stalk with small densely clustered bladder like blades, arising at points in the zig-zag. Some blades had a bifurcation. The whole body of the seaweed was a brownish green with dark brown tinges. Said to grow in the low intertidal and shallow subtidal rocky reefs with moderate wave action, to depth of 10 m. Spotted along the high tide mark on a sandy shore, along with other sea weeds - Western Port Bay

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    1. David Francis  Cystophora torulosa added.

      Reply • 06 Jun 2018

  • Gloiosaccion brownii

    01 Jun 2018-38.4,145.1Leuba Ridgway

    This pale reddish brown elongated sac-like structure with a club shaped tip and narrow base is part of a red seaweed which grows in a clump, attached to the sea floor by a discoid holdfast. The inside of the bladder appears to be filled with mucilage. This bladder was about 50 mm long. This seaweed can grow up to 16 cms in length. The outer walls of sacs growing in rough waters are said to be thicker than those in calm waters. The secretory cells lining the inside of the sacs produce highly viscous mucilage. Spotted along the high tide mark along with other sea weeds on a sandy beach - Western Port Bay. Occur in Seagrass beds upto a depth of 20 mts.

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    1. David Francis  Gloiosaccion brownii added.

      Reply • 06 Jun 2018

  • Hormosira banksii Neptune's Necklace Sea Grapes

    04 Oct 2012-38.5,145.2Mark Ridgway

    These were growing in a small nature reserve on a rocky shoreline just inside the mouth of WesternPort. Greenish brown-algae made of strings of hollow, water-filled, round beads on a short stalk. Each bead has a smooth surface except for an even array of tiny tubercules (containing reproductive cells) and is about 12-15mm diameter. The strings might be up to 200mm long and many strings may grow from a single base. Sometimes called sea grapes.

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  • Corallina spp. Coralline Red Seaweed

    25 Feb 2018-38.3,144.3David Francis

    A coralline red seaweed washed ashore from deeper waters. The jointed stems contain lime/calcium absorbed from sea water. The bleached, calcareous skeletons of Corallines are commonly found washed up on beaches.

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    1. Leuba Ridgway  Nice one !

      Reply • 29 May 2018

  • Hormosira banksii Neptune's Necklace Sea Grapes

    25 Feb 2018-38.3,144.3David Francis

    Huge masses of this well-known brown seaweed covering rocks at low tide. Two pictures.

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  • Hydroclathrus clathratus

    20 Jan 2018-38.4,145.1Leuba Ridgway

    A brown algae with a thallus (body) with multiple holes of varying sizes. The algae is said to be about 10 cm in diameter. But in the one that was washed ashore it was a loose mesh like a woolen hair net. The whole mass was compressible and soft. Found on the inter-tidal zone off Western Port Bay (Balnarring Beach). They are said to grow in the tidal zone. 'Hydro' = water, 'Clathrus' = mesh This species forms dense mats.

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    1. David Francis  Hydroclathrus clathratus added. Great to see some marine biodiversity!

      Reply • 27 Jan 2018

  • Zonaria spp.

    20 Jan 2018-38.4,145.1Leuba Ridgway

    A small clump of brown algae (Phaeophyceae) with flat dark lower branches and twisted paler tips. Spotted on a tidal zone - Balnarring beach ( Westernport Bay). My thanks to Janine Baker for identifying the genus. Possibly Z.spiralis

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    1. David Francis  Zonaria spp. added. (NS adds the group/plural name: spp. = set of all Zonaria species).

      Reply • 27 Jan 2018

    2. Leuba Ridgway  Thanks !

      Reply • 01 Feb 2018

  • Thuretia quercifolia

    20 Jan 2018-38.4,145.1Leuba Ridgway

    A dense clump of pale orange seaweed (red algae) with oak-leaf shaped fronds/thalli. Washed-up onto the beach off Westernport Bay (Balnarring Beach). This species gets it's name "quercifolia" fro the oak-shaped fronds. It is reported that this is a common and distinctive species found in deep waters in the rough-water coasts of southern Australia. My thanks to Janine Baker for the ID.

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    1. David Francis  Thuretia quercifolia added. I was surprised to discover that the Red Algae are separated from the Green and Brown Algae at the Kingdom level!

      Reply • 27 Jan 2018

      • Leuba Ridgway  Thanks David. I have to read about these everytime to refresh my memory. I have several others but might be difficult to identify them.

        Reply • 01 Feb 2018