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Diving has become a popular tourism activity for professionals and novices. Coral reefs or other types of natural sources are still the most preferred diving sites. However, they are under threat for many reasons, for example, climate change, intensive human activities or commercial use. Many countries have promoted artificial reefs to protect coral reefs and create new attractions for tourists. These new underwater atmospheres have changed diving and diving experiences. Wrecks, vessels, monuments, hotels, sunken cities or other types of artificial reef forms invite divers to discover and explore the human-driven underwater environment with novelty seeking, photographic opportunities and mysterious surroundings. This atmospheric turn has brought many advantages to communities, stakeholders and nations with socio-economic benefits, advantages in sustainability management and destination image. This chapter examines the range of underwater atmospheres in different structures and countries and explores their potential benefits.

The purpose of this paper is to review cases of artificial reefs built through additive manufacturing (AM) technologies and analyse their ecological goals, fabrication process, materials, structural design features and implementation location to determine predominant parameters, environmental impacts, advantages, and limitations.

The review analysed 16 cases of artificial reefs from both temperate and tropical regions. These were categorised based on the AM process used, the mortar material used (crucial for biological applications), the structural design features and the location of implementation. These parameters are assessed to determine how effectively the designs meet the stipulated ecological goals, how AM technologies demonstrate their potential in comparison to conventional methods and the preference locations of these implementations.

The overview revealed that the dominant artificial reef implementation occurs in the Mediterranean and Atlantic Seas, both accounting for 24%. The remaining cases were in the Australian Sea (20%), the South Asia Sea (12%), the Persian Gulf and the Pacific Ocean, both with 8%, and the Indian Sea with 4% of all the cases studied. It was concluded that fused filament fabrication, binder jetting and material extrusion represent the main AM processes used to build artificial reefs. Cementitious materials, ceramics, polymers and geopolymer formulations were used, incorporating aggregates from mineral residues, biological wastes and pozzolan materials, to reduce environmental impacts, promote the circular economy and be more beneficial for marine ecosystems. The evaluation ranking assessed how well their design and materials align with their ecological goals, demonstrating that five cases were ranked with high effectiveness, ten projects with moderate effectiveness and one case with low effectiveness.

AM represents an innovative method for marine restoration and management. It offers a rapid prototyping technique for design validation and enables the creation of highly complex shapes for habitat diversification while incorporating a diverse range of materials to benefit environmental and marine species’ habitats.

The purpose of this paper is to prove and qualify the influence of textured surface substrates morphology and chemical composition on the growth and propagation of transplanted corals. Use additive manufacturing and silicone moulds for converting three-dimensional samples into limestone mortar with white Portland cement substrates for coral growth.

Tiles samples were designed and printed with different geometries and textures inspired by nature marine environment. Commercial coral frag tiles were analysed through scanning electron microscopy (SEM) to identify the main chemical elements. Raw materials and coral species were selected. New base substrates were manufactured and deployed into a closed-circuit aquarium to monitor the coral weekly evolution process and analyse the results obtained.

Experimental results provided positive statistical parameters for future implementation tests, concluding that the intensity of textured surface, interfered favourably in the coralline algae biofilm growth. The chemical composition and design of the substrates were determinant factors for successful coral propagation. Recesses and cavities mimic the natural rocks aspect and promoted the presence and interaction of other species that favour the richness of the ecosystem.

Additive manufacturing provided an innovative method of production for ecology restoration areas, allowing rapid prototyping of substrates with high complexity morphologies, a critical and fundamental attribute to guarantee coral growth and Crustose Coralline Algae. The result of this study showed the feasibility of this approach using three-dimensional printing technologies.

Illegal, Unreported and Unregulated (IUU) fishing is one of the most complex and serious environmental crimes affecting marine ecosystems around the globe and depriving coastal communities of vital subsistence resources. Many strategies have been developed to deal with the problem in hopes to eventually eradicate it. This chapter will review a total of 163 approaches implemented around the world, and classify these interventions according to the 25 techniques of situational crime prevention (SCP), one of the most effective crime reduction measures frequently used to deal with a variety of crime problems. This chapter will analyse what types of techniques are most and least frequently used and why; note similarities and differences among these intervention strategies; as well as examine whether there is a distinct difference between developed and developing countries in their use of particular SCP measures to combat IUU fishing. This chapter will also present examples of particularly interesting initiatives, and propose new ways forward.

This chapter provided systematic and comprehensive analysis on trawl fisheries management and conservation measures in the Straits of Malacca. Detailed analysis is conducted on Malaysian fishery management framework particularly domestic country's trawl fishery status, legal structure, input-control strategies, ecosystem protection plan, pollution, law enforcement, and complementary measures that designed to reduce and prevent overfishing in the exclusive economic zone (EEZ) of Malacca Straits. Gaps and challenges found in existing trawl fisheries literature are presented followed by recommendations for improvement in the management and conservation of trawl fisheries.

Seeks to investigate the conceptualization and measurement of service quality and its importance to the dive tourism industry. It reports the findings from a recently conducted study of dive tourist perceptions of service quality as they relate to a tour operator running tours on an artificial reef dive experience in Western Australia. The study also assesses the importance assigned by consumers to the various service quality attributes relative to those perceptions. The results are of significance to operators in that they identify clearly the managerial implications of providing a quality service during the dive tourism experience.