European or Basket Shell Clam Varicorbula gibba > Spisula trigonella -shells identical in size & shape (both curved & meet together evenly) -shell is smooth & cream coloured with brown ?skin? covering -up to 2 cm long -sandy intertidal > Paphies species -Shells identical in size & shape -Shell is smooth & cream coloured with brown ?skin? covering -Up to 2.5 cm long -Sandy intertidal European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth New Zealand Screw Shell Maoricolpus roseus > Terebra lima -Flaring lip -Up to 9 cm long -soft sediments including mud and sand -subtidal from 35 to 350 m depth > Mud Whelk - Velacumantus australis -dirty grey shell with ridges -up to 4.5 cm long -soft sediments in shallow, sheltered areas, usually among seagrass -estuaries, mangroves, tidal flats > Native Screw Shell -narrow tapering shell with marked ridges -off-white to light brown -up to 5 cm long (usually ~3 cm) -up to ~140 m depth Asian Date Mussel/Bag Mussel Musculista senhousia > Cuming's Bag Mussel -Shell is uniformly brown -Shell has ribs on front & rear but not centre -on rocky reefs inside sea squirts > Limnoperna [formerly Xenostrobus] species -shell smooth & elongate with radial markings -variable shell colour ranging from blue to brown/black -shell 3 to 4 cm long -Found in clusters attached to rocks or shells on rocky reefs Northern Pacific Seastar Asterias amurensis > Caulerpa scalpelliformis * 5 arms, rounded not pointed tips * Up to 20 cm across * Rocky bottoms, seagrass beds * Also mud or sand in sheltered areas * 0-143m depth >Port Denison, Qld, to Houtman Abrolhos, WA, incl. Great Australian Bight; Bass Strait; around Tas; Norfolk & Lord Howe Island. Coscinasterias muricata - 7 to 14 arms (usually 11), pointed tips not upturned -up to 50 cm across -colour usually blue to brown. -sheltered reefs & soft substrates -up to 140 m depth. New Zealand Screw Shell Maoricolpus roseus > Terebra lima -Flaring lip -Up to 9 cm long -soft sediments including mud and sand -subtidal from 35 to 350 m depth > Mud Whelk - Velacumantus australis -dirty grey shell with ridges -up to 4.5 cm long -soft sediments in shallow, sheltered areas, usually among seagrass -estuaries, mangroves, tidal flats > Native Screw Shell -narrow tapering shell with marked ridges -off-white to light brown -up to 5 cm long (usually ~3 cm) -up to ~140 m depth European or Basket Shell Clam Varicorbula gibba > Spisula trigonella -shells identical in size & shape (both curved & meet together evenly) -shell is smooth & cream coloured with brown ?skin? covering -up to 2 cm long -sandy intertidal > Paphies species -Shells identical in size & shape -Shell is smooth & cream coloured with brown ?skin? covering -Up to 2.5 cm long -Sandy intertidal Japanese Kelp / Wakame Undaria pinnatifida > Common kelp - Ecklonia radiata ?no midrib or frilly sporophyll ?rough blades not smooth Note: E. radiata is hard to distinguish from juvenile U.pinnatifida. E. radiata is more leathery. -rocky shores -moderate exposures -subtidal to 44 m depth > Phyllospora comosa -no midrib or frilly sporophyll -sawtooth edged fronds -branches close together -blades terminate at base -hard substrates -exposed coasts -subtidal to 20 m depth CSIRO Marine and Atmospheric Research European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth New Zealand Screw Shell Maoricolpus roseus > Terebra lima -Flaring lip -Up to 9 cm long -soft sediments including mud and sand -subtidal from 35 to 350 m depth > Mud Whelk - Velacumantus australis -dirty grey shell with ridges -up to 4.5 cm long -soft sediments in shallow, sheltered areas, usually among seagrass -estuaries, mangroves, tidal flats > Native Screw Shell -narrow tapering shell with marked ridges -off-white to light brown -up to 5 cm long (usually ~3 cm) -up to ~140 m depth European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth Asian Date Mussel/Bag Mussel Musculista senhousia > Cuming's Bag Mussel -Shell is uniformly brown -Shell has ribs on front & rear but not centre -on rocky reefs inside sea squirts > Limnoperna [formerly Xenostrobus] species -shell smooth & elongate with radial markings -variable shell colour ranging from blue to brown/black -shell 3 to 4 cm long -Found in clusters attached to rocks or shells on rocky reefs European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth Asian Date Mussel/Bag Mussel Musculista senhousia > Cuming's Bag Mussel -Shell is uniformly brown -Shell has ribs on front & rear but not centre -on rocky reefs inside sea squirts > Limnoperna [formerly Xenostrobus] species -shell smooth & elongate with radial markings -variable shell colour ranging from blue to brown/black -shell 3 to 4 cm long -Found in clusters attached to rocks or shells on rocky reefs European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth Asian Date Mussel/Bag Mussel Musculista senhousia > Cuming's Bag Mussel -Shell is uniformly brown -Shell has ribs on front & rear but not centre -on rocky reefs inside sea squirts > Limnoperna [formerly Xenostrobus] species -shell smooth & elongate with radial markings -variable shell colour ranging from blue to brown/black -shell 3 to 4 cm long -Found in clusters attached to rocks or shells on rocky reefs Northern Pacific Seastar Asterias amurensis > Caulerpa scalpelliformis * 5 arms, rounded not pointed tips * Up to 20 cm across * Rocky bottoms, seagrass beds * Also mud or sand in sheltered areas * 0-143m depth >Port Denison, Qld, to Houtman Abrolhos, WA, incl. Great Australian Bight; Bass Strait; around Tas; Norfolk & Lord Howe Island. Coscinasterias muricata - 7 to 14 arms (usually 11), pointed tips not upturned -up to 50 cm across -colour usually blue to brown. -sheltered reefs & soft substrates -up to 140 m depth. European Fan Worm Sabella spallanezanii > Sabellastarte species -fan is U shaped not spiral shaped -fans are white or purple with orange/purple/brown bands -usually solitary, not densely clumped -tube up to 5cm long -exposed rocky reef and artificial structures -subtidal to 200 m depth Japanese Kelp / Wakame Undaria pinnatifida > Common kelp - Ecklonia radiata ?no midrib or frilly sporophyll ?rough blades not smooth Note: E. radiata is hard to distinguish from juvenile U.pinnatifida. E. radiata is more leathery. -rocky shores -moderate exposures -subtidal to 44 m depth > Phyllospora comosa -no midrib or frilly sporophyll -sawtooth edged fronds -branches close together -blades terminate at base -hard substrates -exposed coasts -subtidal to 20 m depth CSIRO Marine and Atmospheric Research Asian Date Mussel/Bag Mussel Musculista senhousia > Cuming's Bag Mussel -Shell is uniformly brown -Shell has ribs on front & rear but not centre -on rocky reefs inside sea squirts > Limnoperna [formerly Xenostrobus] species -shell smooth & elongate with radial markings -variable shell colour ranging from blue to brown/black -shell 3 to 4 cm long -Found in clusters attached to rocks or shells on rocky reefs European or Basket Shell Clam Varicorbula gibba > Spisula trigonella -shells identical in size & shape (both curved & meet together evenly) -shell is smooth & cream coloured with brown ?skin? covering -up to 2 cm long -sandy intertidal > Paphies species -Shells identical in size & shape -Shell is smooth & cream coloured with brown ?skin? covering -Up to 2.5 cm long -Sandy intertidal New Zealand Screw Shell Maoricolpus roseus > Terebra lima -Flaring lip -Up to 9 cm long -soft sediments including mud and sand -subtidal from 35 to 350 m depth > Mud Whelk - Velacumantus australis -dirty grey shell with ridges -up to 4.5 cm long -soft sediments in shallow, sheltered areas, usually among seagrass -estuaries, mangroves, tidal flats > Native Screw Shell -narrow tapering shell with marked ridges -off-white to light brown -up to 5 cm long (usually ~3 cm) -up to ~140 m depth