chained_bear commented on the word mackerel-snapper I get the fish-eater thing, but I don't know why non-Catholics wouldn't want mackerel--evidenced by the use of the term in a disparaging phrase. (Or wouldn't want snapper, for that matter.)
Psalm 1 is the first of the Psalms in the Hebrew Bible. Like many of the psalms, it contrasts the  righteous  person (tzadik ×¦×××§) to the wicked or ungodly (rasha` ×¨×©×¢) or the  sinner  (chatta' ×××).
Psalm 9. New International Version. 1 For the director of music. To the tune of 'The Death of the Son.' A psalm of David. I will give thanks to you, LORD, with all my heart; I will tell of all your wonderful deeds. 2 I will be glad and rejoice in you; I will sing the praises of your name, O Most High.