The later model Albin hulls did have some hook to the bottom aft but this one looks extreme. May be just the angle of the pic and lens of the camera. But could be modified.
Thankfully I've never seen an Albin w a FB but these owner built hard tops can get heavy and significantly effect the boat's CG. They are a roundish bottomed boat and very light so CG is a more sensitive issue than w a typical trawler. However many Albins have been modified thus so .........
North Western Washington State USA