Tell me something can worms live in water or a real wet environment?
And if so for how long?
When land floods where do they go, do they go deeper in the ground, I know some die.
Let me answer this in another fashion as well:
If by "worms" we momentarily restrict ourselves to terrestrial Clitellates (
i.e., Earthworms and Potworms), many of them rely entirely on being at all times submerged in a thin film of water, or at least moisture, for their respiration. I used to sample a lot of brooks and rivers in the area for aquatic clitellates a few years back, and got some individuals of these terrestrial groups every time. They survive and even do fine in bottom sediments, as well as in wet moss, soil, and composts. As long as they are wet, they are not incredibly picky.
However, and this is important, especially larger worms --- like earthworms --- are incapable of absorbing sufficient amounts of oxygen unless they are exposed to air. This is because air contains a higher concentration of oxygen than water. As worms lack lungs or similar structures, and have to absorb oxygen through the cuticle, these will drown if submerged for too long (though see below). You have probably seen a lot of earthworms on the pavement during and after heavy rain, precisely for this reason (1).
My old professor sometimes speculates that apart from a handful of species of earthworms that are never found anywhere except in brooks, rivers, and lakes, the earthworms that are found in these habitats are simply terrestrial ones that have crawled into the water and now can't get out, for some reason. His hypothesis is that they do not generally reproduce there, at least not to any great extent. However, this is so far an untested hypothesis.
Nevertheless, these are worms which would certainly not survive being placed in a marine environment. Worms, I understand, are poor osmoregulators. That is, they have no or few mechanisms to regulate the flow of water and dissolved molecules across their cuticle. I would assume that if they were suddenly placed in marine water, they would meet the same fate as other organisms under similar circumstances: as their body has a higher concentration of water than the surrounding seawater, water would leak out through the cuticle and literally make the worm dry out, despite being surrounded by water (2).
Thus, to succinctly answer your questions: they are dependent on water for their survival, but cannot take sea water. Also, the larger forms are incapable of absorbing sufficient quantities of oxygen if submerged for too long. Certainly for 40 days and 40 nights (3).
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(1) This may not be the only reason, though, as current thought is that this is also a spreading mechanism. The idea is that earthworms generally spread to new areas during the night, when they are not harmed by the sun. The same conditions --- chilliness, darkness, wetness --- occur when it is raining, and the earthworms --- which by any measure of intelligence are not particularly bright --- leave the soil and transfer to new areas. When the sun comes back, they try to dig down again, but can't get through the asphalt.
True animal friends will always rescue all earthworms they find from pavements and puddles! Save them from a death of combined asphyxiation and being burned alive!
ETA: I might add that due to the construction of the earthworm's cuticle and circulatory system, a worm which is submerged halfway into a puddle, but with one end outside it will actually drown in one end and dry out in the other. A curious and unenviable death.
(2) According to Randall, Burggren & French's " Eckert Animal Physiology", page 580 (5th edition), earthworms have the following intercellular concentrations of ions (seawater in parenthesis):
Sodium: 76 mM (460 mM)
Potassium: 4.0 mM (19 mM)
Calcium: 2.9 mM (19 mM)
Chlorine: 43 mM (540 mM)
This indicates that there is quite a substantial disequilibrium across the cuticle of an earthworm submerged in sea water.
(3) In addition to Randall
et al (2002) mentioned above, I have also consulted Brusca and Brusca's (2003) excellent book "Invertebrates" (2nd edition) --- a must-have for anyone even vaguely interested in the animal kingdom, its diversity, or how it works.