Wild Manta Ray Welfare: Tourism, Fishing, and Conservation

The welfare challenges facing manta rays — among the ocean's most iconic megafauna — from targeted fishing, bycatch, plastic pollution, and tourism interactions.

Key Facts

Two manta ray species exist: the oceanic manta ray (Mobula birostris) and the reef manta ray (Mobula alfredi), both listed as vulnerable or endangered
Manta rays have the largest brain-to-body ratio of any fish and show evidence of self-recognition, suggesting complex cognitive abilities
Targeted fishing for manta ray gill plates — used in traditional medicine markets — has dramatically reduced populations in parts of Southeast Asia
Entanglement in fishing gear (bycatch) is a major mortality cause; manta rays entangled in nets can drown or sustain serious injuries
Manta ray tourism generates significant revenue in locations including the Maldives, Mexico, and Indonesia, creating economic incentives for conservation
Poorly managed tourism can cause chronic stress: repeated close approaches, touching, and flash photography disturb feeding and social behaviour
Plastic pollution harms manta rays through ingestion and entanglement; they feed by filter-feeding near the surface where plastic concentrates

Welfare Considerations

Manta ray welfare encompasses both direct suffering from fishing and entanglement and subtler welfare impacts from tourism and pollution. Individual manta rays caught in fishing nets or targeted for gill plate harvest experience acute, severe suffering. Entanglement in ghost gear (abandoned fishing nets) may cause prolonged distress before death or escape. Tourism interactions, when poorly regulated, impose chronic low-level stress — mantas that are regularly approached, touched, or prevented from completing feeding runs experience disruption to essential biological functions. Their cognitive complexity makes the quality of individual welfare experience a more serious consideration than for less cognitively elaborate marine animals. Marine protected areas with regulated tourism provide the best welfare and conservation outcomes.

What You Can Do

Never purchase products containing manta ray gill plates — demand reduction is the most direct way to reduce targeted fishing
When snorkelling or diving with manta rays, follow responsible guidelines: no touching, no blocking swimming paths, and no flash photography
Choose dive operators with clear manta welfare policies and active participation in research programmes
Support plastic reduction initiatives that reduce marine pollution in manta ray feeding habitats
Advocate for marine protected areas covering critical manta ray aggregation, feeding, and cleaning sites