FISH ATLASGLOBAL FISH ENCYCLOPEDIA

FISH SPECIES

Fish by Region

Fish by region connects species with the continents, oceans, coasts and river basins where they occur. A regional view complements biological classification because nearby fish may belong to very different lineages.

FISH ATLAS / FIELD GUIDEFish By RegionIN THIS CHAPTER01 / Characteristics02 / Lifestyle03 / Species04 / Field notes
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01 / NATURAL HISTORY

Characteristics

Geographic range is not a fixed visual trait. It is evidence assembled from records across a species' native and introduced range, and one fish may cross several regional boundaries during migrations or over its evolutionary history.

  • 01African fish
  • 02Amazon fish
  • 03Asian fish
美丽硬仆骨舌鱼（Scleropages formosus）
Fish By Region

02 / LIFESTYLE

Lifestyle

Regional fish assemblages reflect the historical biogeography and hydrological cycles of specific river basins and ocean basins. In tropical river systems, seasonal flood pulses expand aquatic habitats across surrounding terrain, triggering rapid nutrient exchanges; in semi-enclosed seas like the Mediterranean, distinct salinity regimes and bathymetric boundaries create specialized coastal and shelf communities with unique seasonal movements.

OBSERVATION INDEX

  1. Hydrological flood-pulse utilization
  2. Basin-specific thermal adaptations
  3. Continental shelf seasonal migrations

03 / SPECIES

Representative species

View all species

Discover representative species illustrating the ecological diversity, morphologies and adaptations of this group.

Acestrorhamphidae

Paracheirodon innesi 的物种图片

neon tetra

Paracheirodon innesi

04 / FIELD NOTES

A closer look

Why do different continents have different freshwater fish families?

Continental drift and ancient river basin isolations over millions of years separated ancestral lineages, allowing distinct families like Characidae in South America and Mormyridae in Africa to evolve independently.

Can marine fish species cross entire oceans?

Some large pelagic species like tuna, swordfish and whale sharks traverse entire ocean basins, whereas coastal reef fish are typically bounded by deep oceanic trenches and cold currents.

How do introduced fish species affect local regions?

Non-native fish can outcompete native species for food, introduce novel pathogens, and alter aquatic food webs, often threatening endemic biodiversity.