- A European sculpin, Myoxocephalus scorpius (synonym Cottus scorpius), having the head armed with short spines.
- Any extinct chelicerate arthropod in the order Eurypterida.
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for sea scorpion in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)