Place lobster tails in a saucepan of well-salted water, cover and bring to a boil. As soon as the pan comes to a boil, turn off the heat and allow lobster tails to sit in hot water for 5 minutes. Bring a large pot of salted water to boil for pasta. Drain lobster tails and let cool, just until they are cool enough to handle. Remove lobster meat from tails by gently cracking apart the underside of the shell, or carefully cut through shell with a pair of sharp kitchen scissors. Cut lobster tails on an angle into 1/2" slices and set aside.
With the tip of a pairing knife slice open vanilla bean and scrape out seeds. Add pasta to boiling water and cook according to package directions until al dente. While pasta is cooking heat a large skillet on medium high. Add butter to skillet and when it foams add vanilla bean seeds and pod and shallots and reduce heat to medium low. Cook, stirring for 1 munute. Add lobster pieces and continue cooking and stirring until lobster is cooked through and coated with butter mixture. Reduce heat to low and drain pasta, reserving about 1/2 cup of pasta cooking water.
Add hot pasta to skillet along with 1/4 cup of pasta cooking water, increase heat to medium and continue tossing mixture until sauce thickens slightly, adding a bit more cooking water if needed to nicely glaze pasta. Season to taste with salt and pepper and arrange pasta on serving plates. Sprinkle with parsley and finishing salt.