What is the general minimum surface water temperature white marlin prefer for sustaining their presence?

Above $71^ ext{F}$ or $22^ ext{C}$

The migratory patterns and distribution of the white marlin are intrinsically linked to thermal gradients throughout the Atlantic waters they inhabit. This species exhibits a strong affinity for warmer conditions, which are crucial for maintaining their high metabolic rate and ensuring optimal cardiac function, especially during long migrations. The established preference dictates that white marlin generally favor and congregate in areas where the surface water temperatures register above $71^ ext{F}$, which is equivalent to $22^ ext{C}$. During the summer months, this preference drives them northward along the coastline, following the warm flow of the Gulf Stream, allowing anglers in zones like the US East Coast to predict their seasonal appearance based on these warming trends.