Collared Worm Salamander vs common sea hare

Oedipina collaris compared with Aplysia punctata

Key Differences

• Collared Worm Salamander is Data Deficient while common sea hare is Least Concern.

Taxonomic Classification

Rank	Collared Worm Salamander	common sea hare
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum	Chordata (хордовые)	Mollusca (моллюски)
Class	Amphibia (земноводные)	Gastropoda (брюхоногие)
Order	Caudata (хвостатые земноводные)	Aplysiida (Aplysiida)
Family	Plethodontidae	Aplysiidae
Genus	Oedipina	Aplysia
Species	Oedipina collaris	Aplysia punctata

Evolutionary Relationship

Collared Worm Salamander and common sea hare share a common ancestor at the Kingdom level: Animalia. (животные)

Conservation Status

Collared Worm Salamander

DD — Data Deficient

common sea hare

LC — Least Concern

Physical Characteristics

Attribute	Collared Worm Salamander	common sea hare
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Collared Worm Salamander

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

common sea hare

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

Collared Worm Salamander

The Collared Worm Salamander, known scientifically as <em>Oedipina collaris</em>, is a slender, elongated salamander belonging to the family Plethodontidae, the lungless salamanders. <em>Oedipina collaris</em> is characterised by its worm-like body form, extremely elongated trunk with many vertebrae, short limbs, and a long tail — morphological features that adapt the species for a burrowing or semi-fossorial lifestyle. As a plethodontid salamander, <em>Oedipina collaris</em> lacks lungs and respires entirely through its moist skin, making it highly dependent on humid environments. The species inhabits freshwater habitats, moist forests, and wetlands. Detailed biological traits including typical lifespan, body length, and weight are poorly documented for this species in available literature. The Collared Worm Salamander is currently assessed as Data Deficient on the IUCN Red List, indicating that insufficient information is available to determine its conservation status accurately, and further research on the species' distribution and population trends is required.

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.