The fiber optic probe hydrophone (FOPH) market is projected to grow from USD 56.7 million in 2025 to USD 88.9 million by 2035, at a CAGR of 4.6%. Interferometric Fiber Optic Hydrophones will dominate with a 45.0% market share, while oil and natural gas prospecting will lead the application segment with a 30.0% share.