It was reported on June 30, 1933, that Dr. Shinkiski Hatai of the Japanese Imperial University had recently made a presentation to the Pacific Science Congress in Vancouver, B.C. detailing the strange behavior of fishes and other aquatic animals prior to earthquakes and tsunamis. 

Dr. Hatai said that it had been observed that fish had refused to take hooks for several days prior to two earthquakes and one volcanic eruption.  

And prior to a tsunami, fishermen were able to catch deep-sea fishes by fishing line, and eels were observed to have been half-protruded from their holes during the daylight hours.  Lastly, mollusks that known to live in deeper water appeared to have migrated toward shallower waters.