Be prepared to spend time in Beach Field 4. It is always a very busy area with lots going on. If you like to adventure with a party this is the place to be.
Monsters:
Hula Octopus- drops red lipstick, octopus leg, bouquet, flower necklace. The hula octopus card is necessary to master some skills so you may want to pick a couple up (though there are a lot of people doing this most of the time).
Sea Scorpion - drops pincers, stinger and scorpion meat jerky
Grumpy Octopus- drops illegal CD
Punisher Cannonshell - drops turban shell, sleeping socks
There is also a chance that they will drop a level 20 weapon or staff.
All monsters in the Beach Fields drop Pointy Object, Pink Potion A, Blue Potion A, as well as level 20 stones and crystals.
Drilling:
Magic Sealed Letter
Crystal
Paper
Jenny Photo B
Swimsuit
Card Hunter's Diary (rare)
Coco Nuferious Shell
Empty Potion Bottle
Pink Potion A
Blue Potion A
5 Galder Coupon
10 Galder Coupon