Balanus amphitrite survived the two cold winters of 1995/1996 and 1996/1997. Actually it was able to reproduce during the following summers of 1996 and 1997. In 1997 there were even two spatfalls due to the late summer being exceptionally warm, especially the month of August. A thorough survey along the Belgian coast during 1996 and 1997 revealed that B. amphitrite was present in the harbours of Oostende and Nieuwpoort but not yet in the harbours of Blankenberge and Zeebrugge. In the harbour of Oostende it occurred in all the docks, mainly on manmade constructions, as well as fouling on yachts. In the harbour of Nieuwpoort, which bas no docks, but extensive tidal yachting harbours, B. amphitrite was found exclusively as fouling on many of the yachts. After the first findings of the southern barnacle B. amphitrite along the Belgian coast in 1995, it appears now that this species has established itself well as a regular member of the fouling cornrnunity.