- Collect fish specimen from the commercial landing centre, fish market or using fish net.
- Bring them to the laboratory.
- Wash them with fresh water to remove the dirt, sand particles and mucus.
- Observe the variation in morphological character.
- Observe
- Body shape- flat, spindle, laterally compressed, dorsoventrally flattened, fusiform, cylindrical, eel like,
- Head: Observe size and shape of the head.
- Mouth location: Superior, inferior, terminal, subterminal, protrusible
- Eyes: Location of the eye- top, middle or bottom: adipose eye lid presence
- Fins: Observe presence or absence of fins. Observe shape and number of fins, fin let, adipose fin,
- Caudal fin shape, forked,rounded, emerginate, truncate, lunate, pointed, pointer and separate from the dorsal, Long first dorsal, short first dorsal followed by
- Barbells:
- Locate operculum and find out the shape.
- spine length,
- Observe the type of Scale
- Examine the presence of lateral line
- Find out the teeth pattern- villiform, incisor, canine and molar
- Compare the character among them.
- Draw a neat diagram.
- Record your observation.
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Participants