Explore the Undersea World of Adventure with Hans Hass
The marine research vessel Xarifa sails to the Indian Ocean with a team of scientists whose object is to explore the underwater life of the coastal regions and the coral reefs.
This first programme of a new series of six films shows the underwater world of the Red Sea, and viewers learn of the way in which large fish depend on the smaller species in connection with their problems of personal hygiene.

(A BBC television film)
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