This cage is the most economical of all the cages in the range giving the lowest cost per square metre of enclosed area. As with the other Tempest cages, the Tempest Octagonal incorporates the same flexible hose technology, pressurised to provide the correct degree of bending stiffness in the cage collar. The corners can be fitted with rigid steel walkways to provide a safe working platform.

The most popular form of this cage is with 16 metre sides giving an enclosed area of 1235m2. With a 10 metre deep net the volume is approximately 16,000m3 giving a biomass production capacity of 200 tons at 15kgs/m3. To maintain net shape and hence volume up to 2000kgs of weight can be suspended from the collar. In most applications this cage is used as a production cage.

A 16 x 16 metre square has been developed which attaches to the octagon using one of the sides as the fourth side of the square. This square can be used for a number of purposes such as holding/starvation of fish for harvest, grading or holding extra biomass. This can be put on and removed at sea.

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