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)
Tag: intertidal
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)
Different-leafed sargassum (Sargassum incisifolium)
Specimen of sargassum found in a rock crevice. Cape Agulhas, Western Cape (2020) - iNaturalist Bushy yellow-brown plants with a triangular stem, small air-floats and two types of blades, attached to the substrate by a large conical holdfast that bears one or several strong perennial stems. The lower 'leaves' are oval and marginally toothed, while… Continue reading Different-leafed sargassum (Sargassum incisifolium)
Vertical zonation on the rocky shores around the coast of South Africa
Coastal Research Group (Rhodes University) - SciFest 2022, Makhanda (Eastern Cape, South Africa) High quality PDF available on demand.
Food webs of the South African rocky shores
Coastal Research Group (Rhodes University) - SciFest 2022, Makhanda (Eastern Cape, South Africa) High quality PDF available on demand.
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)
African black oystercatcher (Haematopus moquini)
A couple of African black oystercatcher on mussel beds and worm reefs. Old Woman's River, Eastern Cape (2018) - iNaturalist A large dumpy, unmistakable wader with its jet-black body, short pink legs and bright orange-red bill and eyes.Birds occasionally have white patches on the belly or entire plumage dove-grey. Male's bill averages shorter and less… Continue reading African black oystercatcher (Haematopus moquini)
Green button polyp (Palythoa mutuki)
A colony of green button polyps covering the bottom of a rock pool. Port St Johns, Wild Coast, Eastern Cape (2021). Polyps are tall and only thinly connected at their bases by underground stems - called stolons. Column brown, embedded with fine sand grains, giving a sandpapery texture. Column trumpet-shaped when expanded. The wide oral… Continue reading Green button polyp (Palythoa mutuki)
Toothed barnacle (Chthamalus dentatus)
Toothed barnacles on a rock face. Cape Agulhas, Western Cape (2020) - iNaturalist A small, flat, dirty-white barnacle with a membranous (not calcareous) base. The projecting, finger-like ridges on the six shell plates produce the characteristic star-shaped outline. Between 5 - 10 mm. Common in the upper intertidal, especially on the South and East coasts.… Continue reading Toothed barnacle (Chthamalus dentatus)
Grey volcano barnacle (Tetraclita serrata)
Close-up of a grey volcano barnacle. Mouille Point, Cape Town, Western Cape (2020) - iNaturalist Tall, dark-grey and volcano-shaped, with only four strongly-ribbed shell plates, the edges of which are difficult to distinguish. About 20 mm. One of the dominant invertebrates in the mid-intertidal zone of moderately sheltered shores. Two Oceans: A Guide to the… Continue reading Grey volcano barnacle (Tetraclita serrata)
F*CK FISH 