Classification of fish  based on feeding habit

1. Herbivorous Fishes:

• They consume about 70% unicellular algae, filamentous algae, and aquatic plants.
• In addition to plant material, these fishes also consume 1-10% of animal food and mud.
• The common examples are Labeo species Osphronemus goramy, Sarotherodon mossambicus, etc. Herbivorous fishes have long and coiled intestines.

2. Carnivorous Fishes:

• The fishes in contrast herbivores have short, the intestine is straight ht, and very few coils are present.
• Some of the carnivores possess intestinal caecae. They prey on small organisms and consume a high percentage of animals such as copepods, daphnia, and insects.Examples of carnivorous fishes are Walla go attu, Mystus seenghala, Mystus classics, Mystus vittatus, Channa striatus, Channa marvelous, Channa punctatus, Notopteruschitala, Rita Rita,

3. Omnivorous Fishes:

• Omnivorous fishes like Cyprinuscarpio, Cirrhina mrigala, Puntius, Clarias, etc. consume both plants and animals.
• The rotifers, mud, and sand are also found in the alimentary canal.
• Their gut length intermediates between carnivorous and herbivorous fishes.

4. Detrivorous or Plankton Feeder:

• They consume detritus along with zooplankton and phytoplankton’s.
• The arrangement of gill rakers aissuch that it filters them from water.
• Examples areCatla cCatla Hilsa Elisa, Cirrhina reba, and Hypopthalmichthys Molitrix. They are both omnivorous and carnivorous.