The different types of gladiators would typically fight against each other based on their armor, weapons, and combat style. For example, the Retiarius was a lightly armored gladiator who fought with a trident and a net. He would typically fight against the heavily armored Secutor, who carried a large shield, sword, and helmet with a rounded top, making it difficult for the Retiarius to entangle him with his net. Another example would be the Thraex (Thracian), who wore a helmet shaped like a fish with a curved sword called a sica, fighting against the heavily armored Murmillo, who had a distinctive fish-shaped crest on his helmet and carried a large rectangular shield and a short sword.