Hase iruka vs common hydra

Delphinus delphis compared with Hydra vulgaris

Key Differences

• Hase iruka is Least Concern while common hydra is Not Evaluated.

Taxonomic Classification

Rank	Hase iruka	common hydra
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Cnidaria (刺胞動物)
Class	Mammalia (哺乳類)	Hydrozoa (ヒドロ虫綱)
Order	Cetacea (Whales & Dolphins)	Anthoathecata (花クラゲ目)
Family	Delphinidae (Oceanic Dolphins)	Hydridae
Genus	Delphinus	Hydra
Species	Delphinus delphis	Hydra vulgaris

Evolutionary Relationship

Hase iruka and common hydra share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Hase iruka

LC — Least Concern

common hydra

NE — Not Evaluated

Physical Characteristics

Attribute	Hase iruka	common hydra
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Hase iruka

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Hase iruka

マイルカ（Delphinus delphis）は大西洋・地中海・インド太平洋の温帯〜熱帯海域に広く分布するイルカで、黒・白・黄色のクロスパターンが特徴的な模様を持つ。IUCNレッドリストでは軽度懸念（LC）に分類されており、世界で最も個体数の多いイルカの一種と考えられている。高速遊泳能力を持ちボウライドを楽しむ行動でよく知られ、数百頭からなる大きな群れを形成することがある。

common hydra

<em>Hydra vulgaris</em>, commonly known as the common hydra, is a small freshwater cnidarian in the family Hydridae. Its conservation status has not been formally evaluated by the IUCN. The species is recorded from Denmark, Norway, and Sweden, with its native range understood to encompass Europe broadly. It typically inhabits slow-moving or still freshwater bodies such as ponds, lakes, and streams, where it attaches to aquatic vegetation or submerged substrates. The common hydra is notable for its remarkable regenerative capabilities and has been the subject of substantial biological research. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden