FISH ATLASGLOBAL FISH ENCYCLOPEDIA

FISH SPECIES

Fish by Appearance

Fish by appearance starts with visible clues such as body shape, color, markings and unusual structures. It is a practical way to compare fish, but appearance alone does not establish identity or ancestry.

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

Characteristics

Streamlined, flattened, deep-bodied and eel-like forms reflect different ways of moving and living. Stripes, spots and colors may aid camouflage or recognition, and they can change with age, sex, season and condition.

  • 01Striped fish
  • 02Flat fish
  • 03Long-bodied fish
Platax orbicularis 的物种图片
Fish By Appearance

02 / LIFESTYLE

Lifestyle

Fish morphologies correspond directly to hydrodynamics, locomotion modes and spatial utilization. Compressed discoid bodies allow high-precision turning among structural barriers like corals and flooded vegetation; depressed bottom-dwelling forms minimize drag while resting flat on the substrate; and disruptive striped patterns break up body contours under flickering aquatic light to obscure orientation from predators.

OBSERVATION INDEX

  1. Discoid maneuvering in complex cover
  2. Depressed substrate conformity
  3. Disruptive coloration in dappled light

03 / SPECIES

Representative species

View all species

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

Ephippidae

Platax orbicularis 的物种图片

batfish

Platax orbicularis

Cyprinidae

Carassius auratus 的物种图片

goldfish

Carassius auratus

Percidae

Perca fluviatilis 的物种图片

perch

Perca fluviatilis

04 / FIELD NOTES

A closer look

Can fish change their color and patterns dynamically?

Yes. Many species alter their pigmentation in seconds to minutes using hormonally and neutrally controlled dermal chromatophores for camouflage, mood, or stress responses.

Why do unrelated fish living in similar habitats look alike?

Through convergent evolution, similar hydrodynamic challenges select for matching body forms—such as the streamlined fusiform silhouettes seen in both tuna and mackerel sharks.

What is the advantage of having eyes on top of the head?

Dorsally positioned eyes allow benthic ambush predators and flatfishes to scan the water column above for food while remaining buried under camouflage sediment.