ThunderCats Roar (2020)

S1E21 Summer Fun Day

The Thundercats are feeling worn out from their constant battles against villains, so Lion-O proposes a day of relaxation at the beach, free from conflict. However, the beach is inhabited by the Crabmen, enormous clawed creatures that attack anyone who dares to tread on their territory. It seems that their day of summer fun could quickly turn into another fight.