Cache is NOT at posted co-ordinates but within 2 km.
A barracuda, or cuda for short, is a large, predatory, ray-finned fish known for its fearsome appearance and ferocious behaviour. The barracuda is a saltwater fish of the genus Sphyraena.[2] It is found in tropical and subtropical oceans worldwide ranging from the eastern border of the Atlantic Ocean to the Red Sea, on its western border the Caribbean Sea, and in tropical areas of the Pacific Ocean. Barracudas reside near the top of the water and near coral reefs and sea grasses.[3] Barracudas are targeted by sport-fishing enthusiasts.
If the swim bladder is large on a barracuda the decimal degrees on the North coordinates are .802. If the swim bladder on the barracuda is smaller than the average fish the North decimal degrees are .745. Assume the first numbers in the North are N 43 37.---
If Barracudas are ferocious, opportunistic predators, relying on surprise and short bursts of speed, up to 27 mph (43 km/h) the West Decimal Degrees are .165. If their speed is up to 47 mph (76 km/) the West Decimal Degrees are .645. Assume the first numbers in the West are W 79 44.---

Info taken from: https://en.wikipedia.org/wiki/Barracuda
Background photo from: Ged Robson