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Fantail Goldfish (Carassius auratus). Lionhead Veiltail Goldfish with red waterlily flowers. Golden Butterflyfish (Chaetodon auriga) (below), with dorsal eyespot, Chequered Butterflyfish (Chaetodon chrysurus) (right), and Rainbow Butterflyfish (Chaetodon trifasciatus). Pearl Gourami (Trichogaster leeri) making bubbles. Walking Catfish (Clarias batrachus). Three-spined Stickleback (Gasterosteus aculeatus) males in territorial dispute. Great Diving Beetle (Dytiscus marginalis) female. Great Diving Beetle (Dytiscus marginalis) female. Great Diving Beetle (Dytiscus marginalis) female taking in air at water surface. Water Boatman or Backswimmer (Noctonecta glauca) nymph. Non-biting midge (Chironomus plumosus) larvae showing gills and false legs. Mayfly (Cloeon species) larva. Mosquito (Culex sp.) pupae hanging at the water's surface. Mosquito (Culex sp.) larvae and pupae hanging at the water's surface. Non-biting midge (Chironomus plumosus) larvae, showing gills and false legs, among stonewort. Water mite (Hydrachna). Water Spider (Argyroneta aquatica) and underwater bell.  Europe Water Spider (Argyroneta aquatica) feeding on dragonfly nymph.  Europe Water Spider (Argyroneta aquatica) male above his underwater bell.  Europe Water Spider (Argyroneta aquatica) male below his underwater bell.  Europe Water Spider (Argyroneta aquatica) female.  Europe Brine Shrimp (Artemia salina) female carrying eggs in pouch. Mantis Shrimp (Squilla empusa). Common Prawn (Leander serratus) female with eggs. Painted Prawn (Hymenocera picta) severing the arm of its Starfish (Aolaster lincki) prey.  Indo-Pacific Shore Crab (Carcinus maenas) first stage larva. Pacific Lobster (Enoplometopus occidentalis) with its slough. Shore Crab (Carcinus maenas) female carrying eggs. Brine Shrimp (Artemia salina). Brine Shrimp (Artemia salina) adult male showing claspers. Shore Crab (Carcinus maenas) male holding a small female prior to mating. Brine Shrimp (Artemia salina) adult male showing claspers. Shore Crab (Carcinus maenas), female parasitised by Saculina. Red Hermit Crab (Dardanus megistos). Young Common Hermit Crab (Eupagurus bernhardus) moving into empty shell of Edible Periwinkle.  Europe Young Common Hermit Crab (Eupagurus bernhardus) in Flat Periwinkle shell, examining empty shell of Edible Periwinkle, before changing shells.  Europe Water Flea (Daphnia magna). Water Fleas (Daphnia magna). Marine planktonic Copepod (Calanus). Freshwater copepods (Diaptomus). Marine planktonic copepod (Calanus).  Atlantic Ocean Marine planktonic copepod (Calanus). Freshwater copepod (Cyclops) female with eggs. Freshwater copepods (Diaptomus). Octopus (Octopus macropus). Octopus (Octopus macropus). Octopus (Octopus macropus).  N. E. Atlantic to W. Pacific Caribbean Reef Squid (Sepioteuthis sepioidea). Soft coral (Alcyonarian). Starfish (Aolaster lincki) regenerating lost arm. (The tip with sensory tube feet has already been replaced).  Indo-Pacific Marine poychaete worm swimming while carrying egg mass.  Atlantic coasts Young Tubifex Worms. Volvox colonies photographed at 40x magnification. Volvox colonies photographed at 15x magnification. Filamentous freshwater green algae (Spirogyra). Filamentous freshwater green algae (Spirogyra).
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