a bat flea vs common sea hare

Ischnopsyllus intermedius compared with Aplysia punctata

Key Differences

• a bat flea is Not Evaluated while common sea hare is Least Concern.

Taxonomic Classification

Rank	a bat flea	common sea hare
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Gastropoda (Gastropoda)
Order	Siphonaptera (Siphonaptera)	Aplysiida (Aplysiida)
Family	Ischnopsyllidae	Aplysiidae
Genus	Ischnopsyllus	Aplysia
Species	Ischnopsyllus intermedius	Aplysia punctata

Evolutionary Relationship

a bat flea and common sea hare share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

a bat flea

NE — Not Evaluated

common sea hare

LC — Least Concern

Physical Characteristics

Attribute	a bat flea	common sea hare
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

a bat flea

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

common sea hare

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

a bat flea

The a bat flea (Ischnopsyllus intermedius) is a species in the genus Ischnopsyllus. It is not yet evaluated on the IUCN Red List. It is found across Denmark, Norway, Portugal, and Sweden, inhabiting diverse terrestrial and freshwater habitats.

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