common sea hare vs Shade Moonwort

Aplysia punctata compared with Botrychium tenebrosum

Key Differences

common sea hare is Least Concern while Shade Moonwort is Endangered.

Taxonomic Classification

Rank	common sea hare	Shade Moonwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Tracheophyta
Class	Gastropoda (Gastropoda)	Polypodiopsida (Polypodiopsida)
Order	Aplysiida (Aplysiida)	Ophioglossales (Ophioglossales)
Family	Aplysiidae	Ophioglossaceae
Genus	Aplysia	Botrychium
Species	Aplysia punctata	Botrychium tenebrosum

Conservation Status

common sea hare

LC — Least Concern

Shade Moonwort

EN — Endangered

Physical Characteristics

Attribute	common sea hare	Shade Moonwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

common sea hare

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

Shade Moonwort

Habitat

Inhabits boreal forests and taiga within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Canada, Iceland, Norway, Sweden, and United States. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.