no mate...the one nearly on junction 30 is a big dobbies garden center. i do try and avoid them though, the staff tell you anything and they also seem over priced. They do have loads of marines in though, some very interesting stuff like marine bettas to stange puffers and box fish The one i use is a tiny one in Mastin Moore the guys who own it are genuinly interested in the fish. They will order for you aswel. They usually have like small gobies, blennys, cardianls, angels etc al the time though.
Whats the beighton one like, im always interested to have a look at other shops