Sponge “B” about 26 cm long x 17 cm wide by 10
fairly small sponges with a single large exhalent osculum.
In the lab pumping rates for each sponge varied considerably
from day to day and at times ceased totally. Rates
showed no obvious correlation with time in the lab, water
temperature, renewed water, light, time of
day or night, oxygen or vibrations. However, this
needs more detailed study. Maximum rates for
the sponges averaged 1cm/sec, 1.7cm/sec and 3cm/sec.
This is comparable to the rates obtained in the field for
the Boot Sponge, another glass sponge, by Gary Silver,
a graduate student at the University of Victoria in the