Purpose This study aims to examine the metal pollution in coastal sediment in the Peninsular Malaysia. Design/methodology/approach Approximately 141 published studies were screened from 1,285 documents and reviewed to determine the existing pollution status in the coastal areas of Peninsular Malaysia and the metals under review were Pb, Hg, Cd, Ar, Cu, Zn, Cr and Ni. Sources of pollutants and their effect on biological systems, marine organisms and human health were addressed in this review as well as recommendation of heavy metal removal or remedies in short. Emphasis is placed on marine pollution, particularly on the toxic metal accumulation in biota. Findings This study has revealed the different concentrations of pollutants, low, moderately, and chronically contaminated areas from heavy metals and the consequences to aquatic ecosystem and indirectly to human health, since an increasing in the coastal developments in Peninsular Malaysia. Originality/value This study has revealed the different concentrations of pollutants, low, moderately, and chronically contaminated areas from heavy metals and the consequences to aquatic ecosystem and indirectly to human health, since an increasing in the coastal developments in Peninsular Malaysia.

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The tri-spine horseshoe crab, Tachypleus tridentatus is listed as 'endangered' in IUCN Red List and coexists with the 'data deficient' species like Tachypleus gigas and Carcinoscorpius rotundicauda in Borneo (Malaysia) (Chen et al., 2019;John et al., 2018). Our knowledge of the T. gigas and C. rotundicauda biology is recent and up-todate in Peninsular Malaysia but not for the case of

The numbers of species and of individuals per species in each tow were determined for seven taxa. A concordance analysis of these data showed that estimates of both numbers of species and species abundance were smaller with the smaller nets. The smaller nets also yielded less diverse samples. These results can best be interpreted in terms of avoidance.

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