Travelers often select marine reserves and dive sites expecting that official protections will help sustain the sharks and rays they hope to encounter. A new analysis shows those expectations frequently do not match reality. Most species in this group have less than 10 percent of their natural ranges inside any marine protected area, and the shortfall is especially pronounced for species already listed as threatened or critically endangered.
Protection on Paper Versus Protection in Practice
Only about 10 percent of the global ocean currently falls inside marine protected areas. That figure sits well below the targets many nations set for the end of the decade. Even where boundaries exist on maps, the level of actual restriction on fishing and other extractive activities often remains unclear or incomplete.
Without reliable information on these restrictions, known as take status, it is difficult to judge whether an area delivers meaningful safety for mobile species such as sharks and rays. The absence of consistent reporting leaves both scientists and travelers without a clear picture of which sites truly limit harm.
What the Research Shows for Sharks and Rays
The study examined range overlap for dozens of shark and ray species against the global network of marine protected areas. The majority of species receive coverage below the 10 percent threshold that researchers consider a minimum for measurable conservation benefit. Coverage between 20 and 40 percent tends to produce stronger outcomes, yet few species reach even the lower bar.
Critically endangered species face some of the largest gaps. The sand tiger shark, for example, appears on the IUCN Red List as critically endangered, yet its range receives limited overlap with protected zones that also enforce strong harvest limits. Similar patterns appear across other threatened populations that travelers sometimes seek during reef or wreck dives.
Why Coverage Alone Does Not Guarantee Safety
Expanding the total area under protection does not automatically translate into better outcomes for every species. Marine protected areas vary widely in size, location, and the rules that apply inside their borders. Species that roam across large distances can easily move outside even sizable reserves during parts of their life cycle.
Lead author Amanda Arnold noted that simply increasing the amount of protected ocean does not necessarily mean threatened species receive real safeguards. The study highlights that current networks leave substantial shortfalls in both geographic coverage and documented restrictions on human activity.
Practical Steps for Travelers and Destinations
Visitors who want their trips to align with stronger conservation outcomes can look beyond the simple presence of a marine protected area label. Several practical checks help separate stronger sites from weaker ones.
- Confirm whether the area publishes clear rules on fishing, harvesting, and vessel activity, and whether those rules are actively enforced.
- Seek operators that contribute data to monitoring programs or partner with research projects tracking shark and ray movements.
- Compare the size and connectivity of reserves; larger, well-linked areas tend to offer better protection for wide-ranging species.
- Support destinations that report regularly on both coverage and take status rather than relying on boundary maps alone.
These details remain uneven across regions, so travelers may need to ask operators or local management agencies directly for the most recent information.
Looking Ahead for Ocean Destinations
The findings underscore that effective protection requires more than lines on a chart. Improving data on restrictions, expanding coverage in priority habitats, and linking reserves across migration routes all remain necessary steps. Until those improvements occur, many popular marine destinations will continue to offer only partial safety for the very animals that draw visitors.
For travelers, the gap between designation and demonstrated benefit is a reminder that conservation value depends on what happens inside each boundary, not only on its existence.
