system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When hurricanes and tsunamis happen what are all the sharks and ocean life doing? Do they swim further out into the ocean or go Into the cities? And do they know when one is coming?
gpt
"Disaster prediction" by animals is a controversial area of science with weak and contradictory evidence supporting its claims. However, tagged sharks have been clearly observed fleeing coastal areas just before hurricanes hit.
>Large self-propelled marine animals such as sharks seem to be minimally affected, since they can detect tiny changes in pressure as larger waves at the surface approach, as well as the reduced surface pressure associated with the storm itself, and go deeper or leave the area. However, hurricanes have been known to result in tremendous numbers of dead fish, crabs, sea turtles, oysters, etc due to reduced amounts of dissolved oxygen in the water, rapid salinity changes, and violent surf. 

No data like this exists for tsunamis, so we don't really know.