In the line of fire: Debris throwing by wild octopuses

Area of Science:

• Marine Biology
• Animal Behavior

Background:

• Octopuses are known for their complex behaviors and intelligence.
• Projectile behaviors in non-human animals are rare and not well understood.

Purpose of the Study:

• To investigate the projectile throwing behavior of Wild Octopus tetricus.
• To determine if these throws are targeted towards other octopuses and the contexts in which they occur.

Main Methods:

• Observational study of Octopus tetricus at Jervis Bay, Australia.
• Analysis of "throws" (propelling shells, silt, algae) in various contexts, including social interactions.
• Documentation of throw vigor, material used, body patterns, and directionality.

Main Results:

• Octopuses were observed throwing materials, often hitting conspecifics during interactions.
• Interactive throws were more vigorous and more likely to use silt.
• Throw directionality and body patterns (uniform or dark) correlated with interactive throws.

Conclusions:

• Wild Octopus tetricus exhibit targeted projectile throwing behavior, particularly during social interactions.
• This behavior is a rare example of non-human projectile use, potentially serving communication or agonistic functions.
• Further research is needed to fully understand the purpose and implications of this behavior.