diff --git a/src/robofish/evaluate/evaluate.py b/src/robofish/evaluate/evaluate.py
index 0316122dc4d9150b37b9447f2d6da616b85a59db..a597237ad389878518f59d4d01cc7f084e24e900 100644
--- a/src/robofish/evaluate/evaluate.py
+++ b/src/robofish/evaluate/evaluate.py
@@ -449,7 +449,7 @@ def evaluate_tank_position(
             x=reduced_xy_positions[:, 0],
             y=reduced_xy_positions[:, 1],
             n_levels=20,
-            shade=True,
+            fill=True,
             ax=ax[i],
         )