Jellyfish have nematocysts, which is a spear on a rope, with poison on the tip. The spear has barbs, so when it goes in, it sticks. Then the jellyfish pulls in its prey. The spears are microscopic, but very abundant.
Yes, but I think snake fangs and jellyfish nematocysts are a slightly different type of weapon. Much more targeted application of venom. If the jellyfish squirted their venom as a cloud into the water around them when a fish came near, I expect it would not be nearly as effective per unit of venom.
As a case where both are present, the spitting cobra uses its fangs to inject venom into its prey. However, when threatened, it can instead (wastefully) spray out its venom towards the eyes of an attacker. (the venom has little effect on unbroken mammal skin, but can easily blind if it gets into their eyes).
Jellyfish have nematocysts, which is a spear on a rope, with poison on the tip. The spear has barbs, so when it goes in, it sticks. Then the jellyfish pulls in its prey. The spears are microscopic, but very abundant.
Yes, but I think snake fangs and jellyfish nematocysts are a slightly different type of weapon. Much more targeted application of venom. If the jellyfish squirted their venom as a cloud into the water around them when a fish came near, I expect it would not be nearly as effective per unit of venom. As a case where both are present, the spitting cobra uses its fangs to inject venom into its prey. However, when threatened, it can instead (wastefully) spray out its venom towards the eyes of an attacker. (the venom has little effect on unbroken mammal skin, but can easily blind if it gets into their eyes).