Category Nuances for manta:

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

Simple Categories for manta:

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