Student Project Figures Figure 19 Pneumatophore or float (clear chamber filled with gas), gonophores (blue sacks, finger-like protrusions underneath the float). The tentacles (dactylozooids) of this specimen were removed for the preparation of microscopy sides for histology. Petri dish is 7.3 cm in diameter. Figure 15 Figure 16 Figure 17 Figure 18 Figure 19