As the museum is undergoing some building work, you’ll have to enter the first floor from the other side. Once you climb the stairs, you’ll find yourself looking at the beautiful Kuppelhalle – it’s where the Café is. Turn around and you’ll spot a big sign that reads “DECK 50”. Head in that direction and make your way through the door that says “Zoologische Sammlung”. As Hall 21 (XXI) is under construction, you'll have to go all the way back to Hall 22 (XXII). Once in Hall 22 (XXII), turn left to row number 2. Nearly there! Just at the near end of the display case on your left, you’ll spot the red corals.