Project Overview: This PhD project investigates the diversity, ecological roles, and functional significance of cryptobenthic fishes—small, camouflaged species less than 5cm long—across a range of marine ecosystems from temperate to tropical coral reefs. Despite their diminutive size, these fishes are abundant and play foundational roles in marine food webs, particularly as prey in coral reef systems. However, their broader ecological impact across different climatic zones remains poorly understood. Research Focus: The project aims to fill this knowledge gap by comparing cryptobenthic fish communities along latitudinal and climatic gradients. Using advanced laboratory and field techniques, you will assess species diversity, community composition, and functional ecology. Analyses will include dietary studies, feeding mode assessments, and productivity measurements to determine how ecological roles shift from cooler to warmer marine environments. The research integrates biogeographical and climate perspectives to generate new insights into the resilience and functioning of marine food webs. Collaborative Environment: The project is supported by the Natural History Museum, London, providing access to world-class taxonomic expertise, specimen collections, and research facilities. Collaboration with the Yas SeaWorld Research and Rescue Centre (UAE) offers opportunities for overseas fieldwork and exposure to dynamic marine environments. These partnerships create a unique platform for ambitious research linking global biogeography with local climate dynamics. Training and Skills Development: You will receive hands-on training in cutting-edge methods such as DNA barcoding, micro-CT scanning, 3D model analysis for functional morphology, and stable isotope analysis for trophic and metabolic ecology. The IGNITE programme at the University of Southampton offers comprehensive personal and professional development, including opportunities to interact with a wide network of academic, research, and policy partners. Specific training includes micro-CT scanning, morphometric analyses, specimen handling, fish identification, and science communication. Eligibility and Funding: Applicants should have a UK bachelor’s degree with upper second-class honours (2:1) or international equivalent in a relevant subject. English language proficiency (IELTS 6.5 overall, minimum 6.0 in each component) is required. The IGNITE Doctoral Landscape Award provides 3.5 years of funding, including a UKRI-standard stipend (£20,780 for 2025/26), full tuition (Home and International), and a Research Training Support Grant (£2,200/year). Both UK and international students are eligible, though international places are limited to 30% of awards. Application Process: Applications must be submitted online by 11:59pm on 8 January 2026. Prospective students are encouraged to contact the lead supervisor to discuss suitability before applying. You may apply for up to two projects but are advised to tailor your application to one. The project is based at the School of Ocean and Earth Sciences, University of Southampton, with fieldwork and research opportunities in the UK and abroad. References: For further reading, see The Atlantic (2019) , TEDx Parramatta (2019) , and Heiple et al. (2023) .