Top Results for Intertidal

The purple sea urchin, Strongylocentrotus purpuratus, is a marine echinoderm native to the eastern Pacific, with a range extending from Alaska to Baja California. It lives on rocky shores and in subtidal habitats, including kelp forests, and is recognized by its purple spines. Researchers use it as...

The purple sea urchin (Strongylocentrotus purpuratus) is a marine echinoderm found along the eastern Pacific coast from British Columbia to Baja California. Described by William Stimpson in 1857, it inhabits rocky intertidal and subtidal zones and feeds primarily on kelp and other algae. Its genome...

Nereocystis luetkeana, or bull kelp, is an annual brown kelp found along the Pacific coast of North America from Alaska to California. It has a long, whip-like stipe and a hollow gas-filled float from which ribbon-like blades extend, and it can reach about 36 m in length. The species forms dense sur...

Pyropia tenera, formerly known as Porphyra tenera, is a species of edible red algae belonging to the Bangiaceae family. It grows naturally in the cold, shallow intertidal waters of the Pacific Ocean, primarily around Japan, China, and Korea. The species is characterized by its thin, flat, and transl...

The shingle urchin (Colobocentrotus atratus) is a species of sea urchin found in the Indo-Pacific region, particularly in areas exposed to heavy wave action. It is uniquely adapted to its harsh intertidal environment through its strongly flattened, dome-shaped test and modified, scale-like spines. T...

Desis martensi is a marine spider in the family Desidae, first described by L. Koch in 1872 and native to intertidal coral reefs and rocky shores of the Indo-Pacific. It breathes air but survives high tide inside silk-lined retreats built in coral crevices or shells, which trap a bubble of air that...

Dendraster excentricus, commonly called the eccentric sand dollar, is an irregular sea urchin native to sandy habitats along the Pacific coast of North America. Its common name refers to the off-center position of the petal-like pattern on the upper surface of its flattened test. Living individuals...

Colobocentrotus mertensi is a sea urchin in the family Echinometridae found across the Indo-Pacific in wave-swept intertidal zones. Its morphology is highly modified for surviving violent surf: the test is flattened and its primary spines are short, broad, and overlapping, giving the animal a shingl...

Palmaria palmata, commonly known as Dulse, is a red seaweed found growing on rocks in the cold waters of the North Atlantic Ocean. It has been harvested for centuries as a food source, particularly in coastal regions like Ireland, Scotland, and Iceland. The alga is consumed dried or fresh and is kno...

The Sea Palm (Postelsia palmaeformis) is a distinctive brown kelp species found on wave-exposed rocky shores along the Pacific coast of North America. It is the only kelp that grows vertically with a palm-like shape, featuring a flexible stipe that holds up its fronds against strong wave action. Thi...

The painted sea urchin is Lytechinus pictus, a small echinoderm native to the eastern Pacific Ocean. It is recognized by its pale or white spines and is found in shallow marine habitats, including rocky shores and subtidal areas along parts of the Pacific coast. Its embryos and larvae have also made...

Irish Moss, or Chondrus crispus, is a species of red algae found abundantly along the rocky Atlantic coasts of Europe and North America. This seaweed thrives in the intertidal and shallow subtidal zones and is characterized by its fan-shaped, cartilaginous fronds. It is heavily harvested because it...

Oarweed, scientifically known as Laminaria digitata, is a large brown marine algae that forms dense subtidal forests along the rocky coastlines of the North Atlantic Ocean. The species is identifiable by its long, flat, finger-like fronds that emerge from a central stipe anchored to the substrate. I...

Egregia menziesii, commonly known as feather boa kelp, is a species of brown algae in the family Lessoniaceae. It is native to the rocky coastlines of the Pacific Ocean along western North America, ranging from Alaska to Baja California. The kelp is characterized by a single long, cylindrical stipe...

Chondracanthus chamissoi is a species of red macroalgae widely distributed along the Pacific coast of South America, particularly in Peru and Chile. Known locally as yuyo, this seaweed grows in subtidal and lower intertidal rocky zones and is harvested both from wild populations and through structur...

Postelsia palmaeformis, commonly known as the sea palm, is a brown alga endemic to the wave-swept rocky shores of the northeastern Pacific coast of North America. It is the sole species in its genus and features a distinctive morphology that closely resembles a miniature palm tree. This intertidal k...

The Sally Lightfoot crab, Grapsus grapsus, is an intertidal shore crab found along the Pacific coasts of the Americas and on offshore islands including the Galápagos. Adults have conspicuous red, orange, yellow, and blue coloration, while younger individuals are darker and better camouflaged against...

Caloplaca marina is a saxicolous, crustose lichen associated with rocky marine shorelines. Its thallus can appear orange to yellow-orange, and the species is adapted to exposed coastal surfaces that receive salt spray and periodic wetting by seawater. It is of interest to lichen observers studying i...

Knotted wrack is a large, long-lived brown seaweed species found along the rocky, sheltered shores of the North Atlantic Ocean. It is easily identified by its olive-brown fronds and distinct air bladders, which allow the algae to float during high tide to access sunlight. The species is commercially...

Verrucaria maura is a lichenized fungus associated with the upper intertidal and splash zones of rocky seashores. Its dark brown to black crust forms persistent patches or bands on exposed rock, giving the species a tar-like appearance across coastal surfaces. The species is adapted to periodic salt...

Ulva lactuca, commonly known as sea lettuce, is a widely distributed green macroalga found in coastal marine and brackish waters globally. It features thin, translucent, sheet-like fronds that are only two cells thick and can grow up to 30 centimeters in length. As an edible seaweed, it is harvested...

Himanthalia elongata, commonly known as sea spaghetti, is a species of brown macroalgae native to the rocky coasts of the North-East Atlantic Ocean. The seaweed is distinguished by its long, strap-like reproductive fronds that extend from a small, button-shaped base, typically growing in the lower i...

Lichina pygmaea is a small fruticose lichen that grows on rocks in the marine splash zone. Its dark brown to black thallus forms compact tufts and is adapted to repeated wetting by seawater, drying, and exposure to wave spray. The species contains cyanobacteria and occupies a coastal niche where few...

"Osmundea pinnatifida" is a species of small red algae commonly found on the lower rocky shores of the North Atlantic Ocean. It is the currently accepted taxonomic name for the seaweed historically known as "Laurencia pinnatifida." In culinary traditions, particularly in the British Isles and Atlant...

Lichina confinis is a shrubby, dark fruticose lichen that plays a crucial ecological role as a primary colonizer in the coastal supralittoral zone across the Atlantic.

Hormosira banksii, commonly known as Neptune's necklace, is a brown alga found along the southern coastlines of Australia and New Zealand. It is recognized by its distinctive chains of bead-like, water-filled vesicles that help the alga retain moisture during low tide exposure on intertidal rocky sh...

Laurencia papillosa is a red alga in the family Rhodomelaceae, widely distributed in tropical and subtropical coastal waters of the Indo-Pacific and other warm seas. It grows on rocky substrates in intertidal and shallow subtidal zones. Species of Laurencia are known for producing a diverse array of...

Fucus vesiculosus, commonly known as bladderwrack, is a brown macroalga widespread across the rocky intertidal coasts of the North Atlantic Ocean, including the shores of Europe and eastern North America. The species is characterized by its flattened, dichotomously branched fronds bearing paired, ga...

Porphyra purpurea is a marine red alga belonging to the order Bangiales, commonly found in the intertidal zones of the North Atlantic coasts of Europe and North America. It features a thin, broad, and translucent foliose thallus that attaches to rocks. Historically, it has been harvested as a tradit...