Category Nuances for manta:

• large,
• migratory,
• marine,
• pelagic,
• unusual,
• larger,
• underwater,
• bigger,
• oceanic,
• big,
• aquatic,

Simple Categories for manta:

• fish,
• denizen,
• ray,
• fauna,
• animal,
• native,
• thing,
• mammal,
• creature,