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The shells have a thin but highly iridescent inner layer of nacre in the part of the shell near the umbos (the pointed end). The family Pinnidae includes the fan shell, Atrina fragilis, and Pinna nobilis, the source of sea silk. Some species are also fished for their food value.
Pinna nobilis, known by the common names noble pen shell and fan mussel, is a large species of Mediterranean clam, a marine bivalve mollusc in the family Pinnidae, the pen shells. [2] It reaches up to 120 cm (4 ft) of shell length. [3] It produces a rare manganese-containing porphyrin protein known as pinnaglobin. [4]
Pinna bicolor, also known as razorfish, razor clam, or pen shell, is a species of large saltwater clam in the family Pinnidae. It is commonly found in shallow waters up to 50 m (160 ft) deep. It can be found embedded in firm muddy intertidal sediments, seagrass beds, and reef flats along continental and island shores.
Pinna noblis shell & byssus. Shell. These pen shells can reach a length of about 80–90 cm (31–35 in). They are characterized by thin, elongated, wedge-shaped, and almost triangular shells with long, toothless edges. The surface of the shells shows radial ribs over their entire length.
The shells should be closed. If any rogue clams are slightly open, gently tap the shell to test them. A dead clam will stay ajar, while a living one will retreat and close its shell. You should ...
The amber pen shell can be found in coastal western Atlantic waters, ranging from southern Florida across the Caribbean and the West Indies to Brazil. [2] [3] [4] [5]The amber pen shell is benthic and usually occurs in medium to coarse sand or mixed substrata (sand, gravel, rocks), in fine calcareous sandy mud of eelgrass (e.g. Zostera spp.), in sandy substrata of turtle grass (e.g. Thalassia ...
Atrina fragilis, the fan mussel, is a species of large saltwater clam, a marine bivalve mollusc in the family Pinnidae, the pen shells.. The fan mussel, Atrina fragilis is one of the largest (30 to 48 cm long) and rarest bivalve molluscs occurring in northern European waters and the only member of the family Pinnidae to inhabit UK waters. [1]
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