Heavy　metals　in　the　ocean　exist　in　various　media　and　assessing　heavy　metal　pollution　in　the　multimedia　in　seawater　is　important　for　proposing　effective　strategies　to　protect　marine　ecosystem　health.　However,　comprehensive　coastal　pollution　assessments　and　SSD-based　assessments　of　heavy　metals　have　been　limited　from　an　international　perspective.　This　study　discusses　the　distribution,　sources,　interactions,　associated　environmental　factors,　and　potential　ecological　risks　related　to　heavy　metal　pollution.　To　attain　this　objective,　several　tools　and　models　were　considered.　The　partition　coefficient　between　sediment　and　water　was　used　to　understand　the　ability　of　heavy　metals　to　be　adsorbed　from　seawater　by　sediment.　The　water　quality　index　was　applied　to　evaluate　the　comprehensive　heavy　metal　pollution　at　different　sampling　sites.　The　species　diversity　index　was　calculated　by　calculating　the　concentration　of　chlorophyll　a.　The　geo-accumulation　and　potential　ecological　risk　indexes　were　employed　for　the　sediments＇　general　pollution　characteristic　of　heavy　metals.　Species　sensitivity　distribution　was　used　for　ecological　risk　evaluation.　The　results　indicated　that　heavy　metal　pollution　and　ecological　risk　(Cu,　Pb,　Zn,　Cd,　As,　Cr　and　Hg)　are　not　serious,　and　the　pollution　conditions　remain　safe.　Only　Cu,　Pb,　and　Hg　concentrations　in　seawater　exceed　the　Nation　Class　I　Water　Quality　Standard.　The　concentrations　of　heavy　metals　showed　significant　spatial　characteristics.　Fisheries　activities　and　industrial　effluent　discharges　were　identified　as　the　main　anthropogenic　sources.　This　study　provides　a　comprehensive　assessment　of　heavy　metals　in　multi-media,　and　the　results　will　provide　valuable　information　for　nearshore　ecological　management　and　risk　avoidance.