1. When stimulated the cnidae secrete nematocyst toxins that are biological poisons. 2. Mohammad Bader, 12, Mountaintop, Pa . _ nematocyst 3. Nematocyst is also called the " stinging organ ".4. Clearing the area of jelly, tentacles, and wetness further reduces nematocyst firing. 5. Some, but not all, species in this genus have prominent white nematocyst clusters. 6. There are four perradial marginal tentacles that are hollow and long and have nematocyst rings. 7. There are also four interradial tentacles that are small and solid . these have adaxial nematocyst clusters. 8. A lance inside the nematocyst pierces the victim's skin, and venom flows through into the victim. 9. Each nematocyst contains a small venom vesicle filled with actinotoxins, an inner filament, and an external sensory hair. 10. They catch their prey by means of cnidocyst ( or nematocyst )-laden tentacles that hang down in the water.
