Thank you for your question. Shrimp is allowed according to the rulings of Sayyid Sistani. Please refer to the below Q&A from his website:
Question: What kind of marine animals are halal?
Answer: It is not permissible to eat from marine animals anything except fish that has scale; shrimp is considered from that category [of permissible sea animals]. But other than fish, like lobster, and similarly the fish that does not have scale is forbidden. Allãh knows the best.
May you always be successful.