1. NO MOTHER COULD GIVE MORE !
The Life History of the Giant Pacific Octopus

2. Original research by James Cosgrove
Photographs by: James Cosgrove,
Jeannie Cosgrove and Fred Bavendam

3. OCTO – WHAT?

20. 1 3 2

32. RESEARCH LOCATION
RESEARCH LOCATION

33. DEN DATA NESTING DENS DEEPER THAN 20 M MANY ARE WALLED OFF
NO MIDDEN HEAP PRESENT
REUSED 42% OF THE TIME (n = 23)

34. MATING OBSERVED
N = 9

35. WALL BUILDING
N = 9

36. EGG LAYING OBSERVED
N = 11

37. NESTS FOUND
N = 34

38. PARALARVAE EYES OBSERVED
N = 16

39. SECOND REVERSAL OBSERVED

40. EGG HATCHING OBSERVED
N = 21

41. FEMALE FOUND DEAD
N = 24

42. NEST DATA Time to lay nest (n = 3) = 28 – 35 days
Number of eggs per string (n = 30) = 176
Number of strings per nest (n = 18) = 388
Average nest size = 68,288 eggs
Average size of paralarvae = 6 mm
Average wet weight of paralarvae =.028g

43. TIME FRAME FROM EGG LAYING TO DEATH (DAYS)
EGG LAYING OBSERVED = 0
EGG LAYING COMPLETE =
EYES OBSERVED =
2ND REVERSAL OBSERVED =
HATCHING OBSERVED =
FEMALE DIES =

44. Acknowledgements
My thanks to the dozens of divers who have contributed their time and equipment to this study.

45. THE
END