| Trabs rise upward parallel to or slightly oblique to excurrent canals and form regular ladder-like structure. |
| The opercular is more often made up of one or more immobile bones which channel the excurrent from gills with individual covers. |
| That is, sperm are created, concentrated and sent out the excurrent openings, sometimes in masses so dense that the sponges appear to be smoking. |
| Oxygen concentration in the excurrent air was recorded every second by the oxygen analyzer and computer described in the BMR section above. |
| Colonies with greater than 12 individuals across, may have fixed water excurrent chimneys reflected in the skeleton. |
| The velocity of the excurrent stream through the osculum may be several hundred times that at the level of the choanocytes. |
