Blacktip Reef Shark
Also known as: Carcharhinus melanopterus (scientific name) · Pulang-punta (local usage among fishers varies; reef sharks are broadly called iho)
Definition
The blacktip reef shark (Carcharhinus melanopterus) is a small requiem shark of Indo-Pacific coral reefs, easily identified by the bold black tips on its dorsal, pectoral, and tail fins. Reaching about 1.6 meters, it patrols shallow reef flats and lagoons — including Philippine reef systems from Batangas to Tubbataha — hunting small fish and octopus, and is listed as Vulnerable by international conservation assessors because of fishing pressure and reef degradation. (Wikipedia)
Identities
| Source Type | Identity |
|---|---|
| Wikipedia | Blacktip reef shark |
| Wikidata | Q726384 |
| DBpedia | N/A |
| ProductOntology | N/A |
| Wiktionary | N/A |
| Library of Congress Subject Headings (LCSH) | N/A |
| MeSH | N/A |
| NCBI Taxonomy | Carcharhinus melanopterus |
| AGROVOC | N/A |
| Google Scholar | Carcharhinus melanopterus blacktip reef shark Philippines coral reef nursery Vulnerable |
| ConceptNet | shark |
| OpenCyc | N/A |
Also Known As
- Carcharhinus melanopterus (scientific name)
- Pulang-punta (local usage among fishers varies; reef sharks are broadly called iho)
Examples and Analogies
- The reef’s beat patrol: Working the same shallow beats daily, blacktips function like neighborhood constables — predictable routes, modest size, and a preference for flushing small prey from coral alleys.
- Fins like signal flags: Its black-tipped fins work the way running lights mark a vessel at night, making identification effortless even in murky lagoon water.
Usage Scenarios
1. Reef Diving and Snorkeling Encounters
Shallow, calm Philippine reef sites give snorkelers reliable blacktip sightings, making the species an entry-level shark encounter that builds local support for shark protection.
2. Fisheries and Bycatch
Artisanal and commercial gear take blacktips as both target and bycatch, feeding local dried-shark supply chains that conservation programs seek to regulate.
Strategies
- Marine protected areas with healthy reef flats and seagrass margins preserve the nursery habitats juvenile blacktips depend on.
- Community shark-sanctuary agreements, pioneered in Philippine municipalities, substitute tourism value for catch value, aligning fisher incentives with shark survival.
Security and Safety Measures
- Blacktips are timid around humans and rarely dangerous; standard practice is calm distance, no chasing or hand-feeding, which can trigger exploratory bites.
- Swimmers at dawn or dusk near reef channels exercise routine caution, as with any wild predator sharing the water.
Historical Context
The species was described from Indo-Pacific collections in the early nineteenth century as European naturalists catalogued reef fauna. In the Philippines, blacktips have long been part of the iho catch in coastal towns, and their fins entered regional shark-fin trade networks as those markets boomed late in the twentieth century. Recent decades reframed the species’ value: as diving tourism grew, sites known for resident blacktips — across Southeast Asia and parts of the Philippine archipelago — demonstrated that live sharks on reefs can out-earn landed ones, feeding into national debates that produced the Philippines’ shark and ray protection policies.
Challenges and Controversies
Slow-Reproducing Populations
Small litters and slow growth mean blacktip populations recover slowly from fishing, prompting argument over catch limits in multi-species artisanal fisheries where enforcement is weak.
Reef Habitat Loss
Because the species lives tight to coral and lagoon habitats, coral bleaching and coastal development shrink its range independently of direct fishing pressure.
Related Topic
Whale Shark