AND OTHER MARINE INVERTEBRATES OF THE TWEED - BYRON COAST, AUSTRALIA.
PELAGIC AND NEUSTONIC
A 5cm piece of pumice providing a home for a variety of species. A mini ecosystem on a tiny raft, at the mercy of wind and current. Found in March 2008, this pumice originates from a volcano just SW of Vav’au, Tonga, called the home reef volcano. It erupted in August 2006
A broken Chambered Nautilus shell covered in Gooseneck barnacles found cast up on Brunswick Heads beach. This is Nautilus macromphalus, a rarer species than the common Nautilus and with a distribution restricted to the southwestern Pacific Ocean, off north-eastern Australia, New Caledonia and Loyalty Islands.
Coral (Pocillopora sp?) skeleton on pumice
These can comprise pumice, seeds, cuttlefish, nautilus and spirula shells, bottles, timber, plastics, shoes, fishing floats, buoys, boats and nets. Even the shells of living Janthina snails can be colonised by goose neck barnacles.
The increase over the last century of marine litter, discarded at sea and flushed out from land, is having a dramatic effect on marine life. It also provides an increasing amount of "rafting" materials for marine organisms, in addition to naturally occurring ones. In some cases extending the geographical range of not only pleustonic species but benthic species as well, as can be seen by the variety of species found on the objects below. Some of the flotsam I have found on local beaches was too large to bring home and photograph and as is usually the case, I did not have my camera with me! I recently came across a large mooring buoy on the beach that was covered in goose neck barnacles and had many Planes crabs and other life in amongst the barnacles. What a find!! I raced home to get camera and bucket and when I returned it was gone, removed by the local council and dumped!!!
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Pumice Pumice Janthina sp Spirula shell Rubber sandal Vine seed Palm seed husk Plastic coffee jar top Plastic scrap Palm seed Cuttlefish bone Coconut Yacht Palm seed Candlenuts Plastic brush
EGGS LAID ON RAFTS
CNIDARIA Versuriga anadyomene Catostylus mosaicus Species? Unnamed species Phyllorhiza sp? Chrysaora wurlerra Pelagia noctiluca Species? Aurelia aurita Species? Aldersladia magnificus Aequorea sp Liriope tetraphylla ? Olindias sp Porpita porpita Velella velella Physalia utriculus Physalia sp Species? Species? Aequorea sp
CTENOPHORA Bolinopsis ashleyi Pukia falcata Beroe sp Neis cordigera Bolinopsis sp? Ocyropsis maculata? Beroe sp Ocyropsis sp Beroe sp Cestum veneris
ASCIDIACEA Pegea sp
CRUSTACEA Planes major Amphipod sp Lepas anserifera Lepas pectinata Lepas anatifera Lepas australis? Idotea metallica Plagusia immaculata Amphipod sp
MOLLUSCA Glaucus marginatus Recluzia sp Glaucus atlanticus Janthina janthina Tergipes sp Janthina prolonga Stylocheilus longicauda Janthina umbilicata Stylocheilus longicauda? Janthina exigua Fiona pinnata Litiopa sp? Sepia sp Spirula spirula Doto sp Trinchesia sp
ANNELIDA Hipponoa gaudichaudi Amphinome rostrata Platynereis sp Simplisetia lizardensis ? Phyllodoce sp? Pseudonereis anomala
© All images Copyright 2011 Denis Riek. All rights reserved.