The size of the escape gap was chosen to allow undersized S.
serrata (85 mm CL in NSW) to pass through. Further, based on
the morphology of A. australis [18] the escape gaps were also
sufficient to allow a ,130-mm TL individual to swim out in a
vertical orientation, and a 350-mm TL individual (the largest size
caught–in the 51-mm conventional trap) to squeeze through
horizontally; a behavior previously observed for several species,
including sparids [27]. Depending on the location in the trap, the
101-mm mesh also should have allowed some small S. serrata and
up to a 250-mm TL A. australis to escape.