Cat shark vs Strand-Egerling

Bythaelurus canescens compared with Agaricus litoralis

Key Differences

• Cat shark is Vulnerable while Strand-Egerling is Least Concern.

Taxonomic Classification

Rank	Cat shark	Strand-Egerling
Kingdom	Animalia (Tier)	Fungi (Pilze)
Phylum	Chordata (Chordatiere)	Basidiomycota (Ständerpilze)
Class	Chondrichthyes (Knorpelfische)	Agaricomycetes (Mushrooms)
Order	Carcharhiniformes (Grundhaie)	Agaricales (Champignonartige)
Family	Scyliorhinidae	Agaricaceae (Agarics)
Genus	Bythaelurus	Agaricus (Button Mushrooms)
Species	Bythaelurus canescens	Agaricus litoralis

Conservation Status

Cat shark

VU — Vulnerable

Strand-Egerling

LC — Least Concern

Physical Characteristics

Attribute	Cat shark	Strand-Egerling
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cat shark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

Found in Chile. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Strand-Egerling

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Cat shark

The Cat shark (Bythaelurus canescens) is a species in the genus Bythaelurus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

Strand-Egerling

Agaricus litoralis, the coastal mushroom, is a saprotrophic agaric fungus in the family Agaricaceae occurring in sand dunes, coastal grassland, and sandy soil habitats along the coasts of northwestern Europe, with confirmed records from Belgium, Denmark, Norway, and Sweden. The genus Agaricus contains the familiar cultivated button mushroom (A. bisporus) along with hundreds of wild species, and members are characterized by a ring on the stem and browning, discoloring, or non-discoloring flesh when cut, features used in field identification. Agaricus litoralis is a medium-sized mushroom producing white to cream-colored caps 4–10 centimeters across with pinkish then dark brown gills and a stout stem with a double ring, fruiting in sand dune hollows and the grassy margins of coastal habitats from summer through autumn. The specific epithet litoralis refers directly to its coastal habitat preference. As a saprotroph, it decomposes organic matter in the sandy soil substrate, releasing nutrients back into the ecosystem. The species is classified as Least Concern by the IUCN, being relatively widespread in suitable coastal sandy habitat across northwestern Europe. Like many coastal fungi, it is specifically adapted to the nutrient-poor, well-drained, alkaline conditions of stabilized sand dune systems.