Salcatonin is the type of calcitonin hormone found in salmon.
As in humans, salmon calcitonin is a peptide hormone secreted by the parafollicular cells of the thyroid gland in response to hypercalcemia, which lowers blood calcium and phosphate by promoting renal excretion.
Synthetic salmon calcitonin may be used therapeutically in humans, as it is twenty times more active than human calcitonin and has a longer half-life. It is used as therapy for Paget's disease and severe hypercalcemia.
References
Salcatonin Wikipedia(Text) CC BY-SA