Pygmy seahare cruising on an algal mat. Old Woman's River, Eastern Cape (2021) - iNaturalist A typical smooth-skinned sea hare with prominent tentacles and ear-like rhinophores. Plain brown or with tiny white dots. About 60 mm in length. Common in shallow bays and estuaries. Hides by day and emerges at night to graze on seaweeds.… Continue reading Pygmy seahare (Aplysia parvula)
Category: Gastropods
Variable burnupena (Burnupena lagenaria)
Variable burnupena outgrown by a slipper limpet. Port Alfred, Eastern Cape (2022). Shell is shorter (spire less than half the aperture length) and often has wavy dark flames.The commonest species on the South-East coast, where it has obvious coarse spiral ridges and its aperture is violet-brown, or yellow. On the West coast, it has an… Continue reading Variable burnupena (Burnupena lagenaria)
Alikreukel (Turbo sarmaticus)
Large alikreukel covered in spiral fanworms (Spirorbis spp.) and pinkish barnacles. Old Woman's River, Eastern Cape (2021) - iNaturalist Also called the giant periwinkle, or the South African turban shell. Large and round, height less than width. About three rows of low nodules spiral around each whorl - though they may erode and disappear in… Continue reading Alikreukel (Turbo sarmaticus)
Ridged burnupena (Burnupena cincta)
Ridged burnupena cruising at the bottom of a rock pool and covered with patches of encrusting coralline algae. Fishhoek, Western Cape (2020). Shell robust. Outer surface with coarse spiral ridges, although West Coast specimens may lack these. Aperture about 1.5 times longer than the spire. Posterior end of outer lip strongly kinked inwards. Dull brown,… Continue reading Ridged burnupena (Burnupena cincta)
Pink-rayed limpet (Cymbula miniata)
Pink-rayed limpet overgrown by algae. Port Alfred, Eastern Cape (2021) - iNaturalist Shell thin, flat and nearly oval, with about 80 fine riblets that alternate in size and are slightly prickly. Pale, shot with numerous beautiful pink rays. Interior pale in the center and with a bluish sheen over the pink rays. About 80 mm.… Continue reading Pink-rayed limpet (Cymbula miniata)
Colonial worm-shell (Dendropoma corallinaceum)
A colony of colonial worm-shell on a rock boulder. Jacobsbaai, Western Cape (2020) - iNaturalist A small gregarious species forming an intertwining mass of long, white, worm-like tubes, often sunken into encrusting coralline algae. Operculum present. About 10 mm long. A filter-feeder which spins a mucus net to trap floating particles. Two Oceans: A Guide… Continue reading Colonial worm-shell (Dendropoma corallinaceum)
Crowned turban shell (Lunella coronata)
Eroded crowned turban shell in a shallow rock pool. Port St Johns, Wild Coast, Eastern Cape (2021) - iNaturalist Distinguished by its operculum, which has a greenish tinge and is smooth or has only a faint granulation. Shell with strong, spirally-arranged nodules, the uppermost row on the body whorl being particularly well developed and forming… Continue reading Crowned turban shell (Lunella coronata)
Kelp limpet (Cymbula compressa)
Kelp limpet on a drifting kelp stem. Mouille Point, Cape Town, Western Cape (2020) - iNaturalist Shell elongated, the sides compressed so that the opening is concave, designed to fit a cylindrical kelp stem. Shell 'rocks' on a flat surface. Outer surface brown, finely ribbed. Interior blue-white to brown. About 90 mm. Found almost exclusively… Continue reading Kelp limpet (Cymbula compressa)
Pink-lipped topshell (Oxystele sinensis)
Large pink-lipped topshell on a bed of coralline algae. Port Alfred, Eastern Cape (2021) - iNaturalist Larger than the other Oxystele species. Round, blunt-spired shell with fine spiral sculpturing. Dark purple-black above. Aperture with a distinctive pink inner lip. About 45 mm. Lives moderately low on the shore, extending down to about 5 meters. Grazes… Continue reading Pink-lipped topshell (Oxystele sinensis)
Rayed limpet (Helcion pruinosus)
Rayed limpet with iridescent green spots and rays in a shallow rock pool. Port Alfred, Eastern Cape (2021) - iNaturalist Shell low, fragile and oval. Apex about one-third from the front margin. Surface smooth, pale brown, shot with beautiful iridescent green spots and rays. About 25 mm. Hides beneath low-shore boulders during the day, and… Continue reading Rayed limpet (Helcion pruinosus)
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