- marine mammals
- marine management
- marine meteorological chart
- marine meteorology
- marine methanogens
- marine microbes
- marine microbial geochemical survey for oil and gas
- marine micro-organism
- marine microorganism
- marine military engineering survey
- marine mineral resources chart
- marine mineral resources investigation
- marine module drilling rig
- marine mollusk
- marine mollusk resources
- marine mollusks bacterial diseases
- marine multi-channel seismic exploration
- marine natural product peptide
- marine natural tourism resources
- marine nature reserve
- marine navigation
- marine navigation and positioning
- marine nekton
- marine new productivity
- marine nitrogen cycle