Eastern Yellow Wagtail (currently not in database). Lots of twitchers out looking for this today, and it took quite a lot of effort to find it. Luckily, someone did and then pointed it out to everyone else. First sighted a few days ago. Sorry about the extremely poor quality photo, but distant views were the best I got.
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
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.
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
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.
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.
This sea slug would have been about 5 " in length. It had mottling of cream and brown. The ear-like sensory clubs or rhinophores and oral tentacle were withdrawn and the usually extended side flaps called parapodia were flipped back. The mantle and atrophied shell could be seen (pic 5) as a reddish radiating structure.
I have the expert Mattt Nimbs to thank for the ID. He says "Definitely Aplysia. And yes probably A sydneyensis, there is a wheel like pattern of radiating stripes on the mantle that sits over the vestigial shell: a distinguishing characteristic of sydneyensis"
This green seaweed (Caulerpa cactoides) appeared in two forms, one as a cluster and the other as an elongated string of vesicles attached to flattened median segments. This variation in appearance is apparently due to wave action in different parts of the bay.
Pic 2 shows some brown (root-like) rhizoids at the base of the seaweed.
Spotted washed ashore at Westernport Bay -at low tide. Native to Australia.
Thousands of these small plants were being flushed through the tiny, intertidal channels. They had a sharp, tought, spiny foot which was superb for latching onto rocks and sand. Some would then work their way into the sand as the water pulsed them back and forth. Each was about 60mm long.
Sublittoral zone, near the mouth of a large open bay. The bay is generally very shallow with clean sand floor but receives a decent flush of southern ocean water via some very deep channels.
Found on a broad sandy beach facing the Southern ocean this very firm, moist, velvety dark green ball was washed up.
I have seen them before but never thought much about them.
A bit larger than a golf ball, very slightly translucent, very dense like it was full of water, tough yet velvety.
Chlorophyta : Bryopsidophyceae : Bryopsidales : Codiaceae
Apparently they can be up to 120mm dia. and are composed of a single cell which can repair itself if damaged.
It appears fluffy underwater.
Many of these were found on small rocky areas near an ocean beach at low tide.
About 20mm diameter, mostly matte black.
Ocean/bay beach on a small patch of sedimentary rocks.
No operculum was found nor live specimens so species ID is difficult.
Sea squirts/ tunicates/ascidians which appeared like clumps of collapsed "sand-crusted" sacs stuck to a sea fan. Each sac had two openings with scalloped edges - one on top and the other to the side (inhalant & exhalant siphons). The sacs seemed to have a reddish tinge. The inside of each sac had organs which were red in colour with a brown segment towards the base (pics 3 & 4). The organs seemed to be covered by mucilaginous substance. Commonly also called Conjevoi.
This creature had just been left among the detritus at high-tide mark as the water began to recede.
It seemed that it was beginning to dry out in the sand.
150mm long and about 60mm diameter, cylindrical but tapered both ends; very small 'mouth' opening at one end; pale cream coloured to pale orange at the 'head' end; felt very firm but dry to touch; some minor wrinkles covering most of the body (could be from beginning to dry out?) These might be the most non-descript creatures I can think of - ventral, dorsal, lateral views almost indistinguishable!