There are a few key differences between Chinese algae eaters and Siamese algae eaters. For one, Chinese algae eaters are typically much larger, growing up to about a foot in length. They also have a more torpedo-shaped body, whereas Siamese algae eaters are more slender and eel-like. Perhaps the most notable difference is in their feeding habits: while both species feast on algae, Chinese algae eaters will also consume other small aquatic creatures like insects and crustaceans.