00:01
So the second species that diverges from our animal kingdom tree are the nidarians.
00:14
But what do all nidarians have in common? they're all needle -like stinging beasts.
00:21
They all have these special organ nails in common, stinging organelles that shoot out venom.
00:30
Not snake, not the hila monster, but the box jellyfish is one of the most venomous animals on earth.
00:43
Now, besides the fact that each of the jellyfish has needle sites or stinging organols, there are many more interesting facts about these group of species, and one of them is that they are often in two forms.
01:04
Medusa, or the stinging hair like snakes falling from the bulb like jellyfish, or polyp that are not moving and fixed at a position next to the ground.
01:27
Oftentimes, these forms are alternated in the life form of the nidarians, but sometimes they are completely medusa or polyp throughout their lifetime.
01:42
Another interesting fact about them is that they are neither dutrosome or proteosome, but simply diploblastic.
01:54
Remember how after periphera, nigerians were the ones to diverge from the animal kingdom? they are one of the earliest in the animal kingdom.
02:06
And since they diverge so early, rest of the other species are tripoloblastic, or they have the mesoderm, ectoderm, and the endoderm...