nematocysts


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nematocysts

the stinging capsules of marine animals in the phylum Cnidaria. They are the characteristic feature of members of the phylum.
References in periodicals archive ?
Following decontamination, the next step is to remove any remaining nematocysts by applying shaving cream or soap, then shaving the area.
Scientists have known for decades that cnidarians fire nematocysts in response to a combination of chemical and tactile stimuli.
Then the researchers touched the anemones with a tiny, vibrating, gelatin-coated probe and counted the number of nematocysts shot into the probe under varying conditions.
Hessinger speculates that the receptor interactions evolved as a sort of "on-off" switch that helps prevent unnecessary firing of "expensive" nematocysts.
Several experiments were conducted to determine which products would stop the discharging of nematocysts released from Portuguese man-of-war.
When nematocysts were deactivated, the pompano failed to discriminate between clams with and without hydroids, suggesting that nematocysts are responsible for deterring this predator.
Hydroid defenses against predators: the importance of secondary metabolites versus nematocysts.
Usually, many nematocysts are triggered at the same time, shooting many barbs into whatever brushes past.
In some types of anemones, the nematocysts inject poison--both to catch their prey and to protect the anemone from other predators.
When attacking anemones, shrimp were prone to be stung with nematocysts and usually chose smaller, less harmful anemones.
We observed that even satiated shrimp (after being fed with Artemia nauplii for an hour) would attempt to attack the anemones, but rescinded after being stung by the nematocysts.
Food and Drug Administration, is a topical anesthetic which neutralizes the toxins released by nematocysts left on the skin when a jellyfish tentacle comes into contact with flesh.