1. Phylum
    2. 1. Classification of Animals
    2. Protozoa
    3. Porifera
    4. Coelenterata
    5. Platyhelminthes
    6. Nemathelminthes
    7. Annelida
    8. Earthworm
    9. Arthropoda
    10. Cockroach
    11. Mosquito
    12. Honey bee and Silk moth
    13. Mollusca
    14. Echinodermata
    15. Hemichordata
    16. Chordata
    17. Pisces
    18. Amphibia
    19. Frog
    20. Reptile
    21. Aves
    22. Mammalia
    23. Rabbit bone
  2. Animal Behaviour and Adaptation
    3. 24. Animal behaviour
    25. Animal adaptation
    26. Migration
  3. Developmental Biology
    4. 27. Development of Animals
    28. Development of Frog
  4. Human Biology
    5. 29. Tissues
    30. Sense organs
    31. Digestive system
    32. Circulatory system
    33. Respiratory system
    34. Nervous system
    35. Endocrine system
    36. Reproductive system
    37. Excretory system
    38. Skeletal system
    39. Basic concept of Immunology
    40. Human diseases
  5. Evolutionary Biology
    6. 41. Origin of Life
    42. Organic Evolution
    43. Theories of Evolution
    44. Evolution of Human beings
    45. Horse Evolution
Animal Behaviour and Adaptation
26. Migration
FISH 🐟 MIGRATION
▢ Types of Fish Migration (Based on Sea and Freshwater):
❖ Diadromous:
◉ Definition: Migrate between Freshwater and Sea
◉ Catadromous:
◈ Description: Lives in Freshwater and migrates to Sea for breeding
◈ Examples:
■ Eel (Anguilla):
  1. American eel
  2. European eel
◉ Anadromous:
◈ Description: Lives in Sea 🌊 and migrates to Freshwater for breeding
◈ Examples:
  1. Salmon
  2. Sea lamprey
  3. Hilsa
◉ Amphidromous:
◈ Description: Migrates between Freshwater and Sea (not for breeding but for feeding), occurs regularly at definite life stages
◈ Examples:
  1. Gobies fish
❖ Potamodromous:
◉ Description: Migrates within Freshwater for breeding
◉ Examples:
  1. Carp
  2. Trout fishes
❖ Oceanodromous:
◉ Description: Migrates within Sea 🌊 for breeding
◉ Examples:
  1. Herrings
  2. Mackerels
  3. Tunas
BIRDS MIGRATION
▢ Key Fact: Migration of Birds is affected by Gonadotropic hormone