Do you mean Venomous? And it depends greatly on the species. Some species, while not known to have ever produced human fatalities, have venom that can produce extreme discomfort over a period of several days. While others are absolutely harmless, to people anyway.
http://en.wikipedia.org/wiki/Tarantula
a sea serpent is venmous becouse it has poisonous teeth
From my experience, tarantula's typically enjoy eating corn on the cob (never off the cob, they tend to get their feet stuck in it).
No, they feel vibrations with the hairs on their legs..... and remember there more scared off you then your scared of them. spiders are very venimis be carefull children you mite be bitten by one they are very stinky
There are 123 venomous snakes in Texas and 3456 non-venomous snakes in Texas.