Common Feverfew vs common sea hare

Tanacetum parthenium compared with Aplysia punctata

Taxonomic Classification

Rank	Common Feverfew	common sea hare
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Mollusca (Mollusks)
Class	Magnoliopsida (Dicots)	Gastropoda (Gastropoda)
Order	Asterales (Daisies & Sunflowers)	Aplysiida (Aplysiida)
Family	Asteraceae (Daisy Family)	Aplysiidae
Genus	Tanacetum	Aplysia
Species	Tanacetum parthenium	Aplysia punctata

Conservation Status

Common Feverfew

LC — Least Concern

common sea hare

LC — Least Concern

Physical Characteristics

Attribute	Common Feverfew	common sea hare
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Feverfew

Habitat

Inhabits Mediterranean forests and woodlands within the Palearctic biogeographic realm.

Range

Widely distributed across Asia (Cyprus, India, Japan), Europe (27 countries), North America (Canada, Mexico, United States), Oceania and the Pacific (Australia), and South America (6 countries).

common sea hare

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

Common Feverfew

Common Feverfew (<em>Tanacetum parthenium</em>) is a flowering herbaceous plant belonging to the genus Tanacetum within the family Asteraceae. It is characterised by its aromatic foliage and clusters of small daisy-like flowers with white ray petals surrounding yellow disc florets. The species typically inhabits Mediterranean forests and woodlands within the Palearctic biogeographic realm, and is also often found in disturbed habitats, roadsides, walls, and garden margins. Its geographic range is exceptionally wide, spanning Asia including Cyprus, India, and Japan, 27 European countries, North America including Canada, Mexico, and the United States, Australia, and multiple South American countries. <em>Tanacetum parthenium</em> is assessed as Least Concern on the IUCN Red List. The plant has a long history of medicinal use, particularly in the treatment of migraines and fevers, from which its common name derives. Biological traits including average lifespan and detailed ecological data remain poorly documented in the scientific literature, though it typically grows as a short-lived perennial or biennial.

common sea hare

<em>Aplysia punctata</em>, the common sea hare, is a large opisthobranch sea slug in the family Aplysiidae, order Aplysiida, found in the northeastern Atlantic Ocean and Mediterranean Sea, with confirmed records from Denmark, Norway, Portugal, and Sweden. This species typically inhabits shallow subtidal and intertidal zones with abundant macroalgae, feeding primarily on red and green algae — a diet that influences the color of the defensive purple ink it secretes when threatened. <em>Aplysia punctata</em> is a simultaneous hermaphrodite, capable of acting as both male and female during mating, and often forms mating chains involving multiple individuals. It can reach considerable size among European opisthobranch species, though body dimensions vary considerably with age and feeding conditions. The species is classified as Least Concern by the IUCN, reflecting stable populations across its coastal range. Biological traits for this species remain poorly documented in the scientific literature, including precise average data on lifespan, body length, weight, and detailed seasonal dietary patterns, though its general herbivorous feeding on macroalgae is well established.

Shared Countries

Both species can be found in 4 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden