When Raquel shows while ALF is officiating the Tanners' vow renewal, they pretend they are having a memorial for Brian's turtle Gabby.
Gabby is the name of a non-existent turtle that Brian, whose funeral Brian fabricates when Raquel comes over and finds the Tanners dressed up so that ALF can officiate the Tanners' wedding vow renewal.
After the ceremony, ALF proceeds to deliver a eulogy for Gabby.