Bracken vs common sea hare

Pteridium aquilinum compared with Aplysia punctata

Taxonomic Classification

Rank	Bracken	common sea hare
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Tracheophyta	Mollusca (Mollusks)
Class	Polypodiopsida (Polypodiopsida)	Gastropoda (Gastropoda)
Order	Polypodiales (Polypodiales)	Aplysiida (Aplysiida)
Family	Dennstaedtiaceae	Aplysiidae
Genus	Pteridium	Aplysia
Species	Pteridium aquilinum	Aplysia punctata

Conservation Status

Bracken

LC — Least Concern

common sea hare

LC — Least Concern

Physical Characteristics

Attribute	Bracken	common sea hare
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bracken

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 9 distinct biome types spanning the Afrotropic and Neotropic and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (6 countries), Asia (Iran, Turkey), Europe (6 countries), North America (4 countries), Oceania and the Pacific (Australia), and South America (4 countries).

common sea hare

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

Bracken

The Bracken (Pteridium aquilinum) is a species in the genus Pteridium. It is currently classified as Least Concern on the IUCN Red List. Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 9 distinct biome types spanning the Afrotropic and Ne

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