class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of skin supported by radially extended thin bony spines called lepidotrichia, as opposed to the bulkier, fleshy lobed fins of the sister class Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles).- National Nordic Museum (Wikipedia)
The National Nordic Museum (previously Nordic Heritage Museum and then Nordic Museum) is a museum in the Ballard neighborhood of Seattle, Washington, United States, dedicated to the Nordic history, art, culture, and the heritage of the area’s Nordic immigrants. It was founded in 1980 as the Nordic Heritage Museum, moved into a permanent, purpose-built facility in 2018 named the Nordic Museum, and was designated as the National Nordic Museum in 2019. The museum serves as a community gathering place and shares Nordic culture by exhibiting art and objects, preserving collections, and providing educational and cultural experiences from Danish, Finnish, Icelandic, Norwegian and Swedish Americans. The geographical region covered by the Museum includes the entire Nordic region (Denmark, Finland, Iceland, Norway, Sweden, Estonia, the regions of the Faroe Islands, Greenland, and Åland, and the cultural region of Sápmi).
- Tetraodontiformes (Wikipedia)
The Tetraodontiformes (/tɛtrə.ɒˈdɒntɪfɔːrmiːz/) are an order of highly derived ray-finned fish, also called the Plectognathi. Sometimes these are classified as a suborder of the order Perciformes. The Tetraodontiformes are represented by 10 extant families and at least 349 species overall; most are marine and dwell in and around tropical coral reefs, but a few species are found in freshwater streams and estuaries. They have no close relatives, and descend from a line of coral-dwelling species that emerged around 80 million years ago.