Marine life Andaman NicobarAndaman & Nicobar
Coral reef underwaterCoral Reef
Lakshadweep marine biodiversityLakshadweep
Marine invertebratesInvertebrates
New species of polyclad flatwormNew Species

About

Marine Biologist & Taxonomist

I am a marine biologist and taxonomist with over twelve years of experience studying coral reef ecosystems and marine invertebrate diversity. My research focuses on the taxonomy of polyclads, nudibranchs, sipunculids, and corals, combined with extensive coral reef monitoring across the Arabian Gulf, Lakshadweep, and Andaman & Nicobar Islands.

I have described more than a dozen species new to science, contributed to biodiversity assessments, and supported conservation planning through Red List evaluations. Alongside research, I curate natural history specimens and engage in public exhibitions to share the importance of marine biodiversity.

My work bridges taxonomy, reef ecology, and conservation to advance both scientific knowledge and ecosystem protection — aiming to inspire, educate, and drive conservation efforts worldwide.

12+
Years of Research
600+
Scientific Dives
15
New Species Described
20+
Peer-reviewed Papers
Dr. Sudhanshu Dixit during fieldwork
Underwater research fieldwork

Career

Professional Journey

2023 — Present
Post Doctoral Fellow
King Fahd University of Petroleum & Minerals, Saudi Arabia
  • Taxonomy of coral associated invertebrates
  • Coral reef monitoring & biodiversity surveys, Arabian Gulf
  • Ecological assessments & Environmental Impact Studies
  • Specimen curation & scientific diving
2022 — 2023
Project Scientist - I
National Centre for Coastal Research (NCCR), Govt. of India
  • Coral reef surveys & restoration studies, west coast of India
  • Biodiversity assessments of coastal ecosystems
  • Taxonomy of benthic invertebrates
2017 — 2022
Project Scientist - B
Centre for Marine Living Resources & Ecology (CMLRE), Govt. of India
  • Long-term reef monitoring in Lakshadweep Islands
  • Taxonomic studies of corals, reef and benthic invertebrates
  • Scientific cruises aboard FORV Sagar Sampada
2013 — 2017
Research Fellow / Associate
Zoological Survey of India (ZSI), Andaman & Nicobar Islands, Govt. of India
  • Taxonomy of marine flatworms (Ph.D. research) & nudibranchs
  • Biodiversity surveys in Marine Protected Areas & island ecosystems
  • Specimen curation for natural history collections

Academic Background

Education & Qualifications

🎓
Ph.D. in Marine Biology
2019
📘
Master's in Marine Biology
2012
📗
B.Sc. Zoology (Honours)
2010
🤿
Advanced SCUBA Diving
~600 Scientific Dives

Taxonomic Discoveries

15 New Species Described

14 new species of Polyclads (Marine Flatworms) and one new species of Sipuncula described to science — several nudibranchs and flatworms also reported as new records for Indian waters.

Acanthozoon fuscobulbosum new species Bulaceros newcannorum new species Paraplanocera kalpeniensis new species Prostheceraeus fuscolineatus new species
01 · Polycladida
Acanthozoon fuscobulbosum Dixit, Sivaperuman & Raghunathan, 2018
02 · Polycladida
Bulaceros newcannorum Dixit, 2021
03 · Polycladida
Paraplanocera kalpeniensis Dixit and Sreeraj, 2024
04 · Polycladida
Prostheceraeus fuscolineatus Dixit, Raghunathan & Chandra, 2017
05 · Polycladida
Pseudoceros agattiensis Dixit, 2019
06 · Polycladida
Pseudoceros auranticrinis Dixit, Raghunathan & Chandra, 2017
07 · Polycladida
Pseudoceros bifascia Dixit & Sreeraj, 2024
08 · Polycladida
Pseudoceros bipurpureus Dixit, 2021
09 · Polycladida
Pseudoceros galaxea Dixit, 2021
10 · Polycladida
Pseudoceros galatheensis Dixit, Raghunathan & Chandra, 2017
11 · Polycladida
Pseudoceros meenae Dixit, Sivaperuman & Raghunathan, 2018
12 · Polycladida
Pseudoceros nigropunctatus Dixit, Raghunathan & Chandra, 2017
13 · Polycladida
Pseudoceros stellans Dixit, 2019
14 · Polycladida
Pseudoceros vishnui Dixit, Raghunathan & Chandra, 2017
15 · Sipuncula
Aspidosiphon carnicobarensis Dixit and Silva-Morales, 2023

Recognition

Key Achievements

📄
Published Research
Taxonomic Contributions
Recognised for advancing the taxonomy of marine invertebrates through peer-reviewed publications, species descriptions, new records, and biodiversity assessments across Indian and Arabian reef ecosystems.
20+
🔬
15 New Species to Science
Taxonomic Discoveries
14 new species of Polyclads (Marine Flatworms) and one Sipuncula species described. Several nudibranchs and flatworms reported as new records for Indian waters.
15
🌊
Educational Outreach
Public Engagement
Specimen exhibitions, outreach programs and awareness campaigns making taxonomy and reef ecology accessible to wider audiences.
✍️
Peer Reviewer & Author
Professional Recognition
Reviewer for Zootaxa, Bulletin of Marine Science, and JMBAUK. Authored two books on Indian marine invertebrates.

Research Output

Selected Publications

2025
Gopi, J., Joydas, T.V., Manokaran, S., … , et al. Profiling the microeukaryote diversity in arid sabkha soils in NEOM, Saudi Arabia. Ecological Frontiers.
2025
Jayachandran, P.R., Joydas, T.V., … Dixit, S., et al. Ecological filtering and functional trait patterns in polychaete communities of the Arabian Gulf. Marine Environmental Research, 107373. doi ↗
2025
Neelavannan, K., … Dixit, S., et al. Geospatial distribution and anthropogenic litter impact on coastal mangrove ecosystems, Saudi Arabia. Scientific Reports, 15(1), 15964. doi ↗
2024
Dixit, S. & Sreeraj, C.R. Two new polyclad flatworm species from the Lakshadweep Islands, India. Zootaxa, 5446(3), pp. 405–419.
2024
Sadhukhan, K., Dixit, S., et al. Resilience-Based Assessment of Shallow Water Patchy Reefs in Palk Bay. Ocean Science Journal, 59(3), 36.
2023
Dixit, S., Yonow, N., et al. The curious case of Phyllidia ocellata and first molecular data of three phyllidiid species from India. Molluscan Research 43:1, 34–49.
2023
Dixit, S., Silva-Morales, I. & Saravanane, N. The genus Aspidosiphon: description of a new shell dwelling species. Bulletin of Marine Science. doi ↗
2021
Dixit, S., Manjebrayakat, H. & Saravanane, N. Two new Pseudoceros from Agatti Island, India and a species checklist from Indian waters. JMBAUK 101: 253–263. doi ↗
2020
Dixit, S., Manjebrayakat, H. & Saravanane, N. A rare polyclad genus Bulaceros: new species and new record from Indian coral atolls. Marine Biology Research, 16:8–9, 632–642.
2019
Dixit, S., et al. Polyclad fauna of Agatti Island, Lakshadweep, India: new records and two new species. Zootaxa 4657(2): 246–260.
2017
Dixit, S., Raghunathan, C. & Chandra, K. Two new marine flatworms from Andaman & Nicobar Islands. Zootaxa, 4221(1), 111–122.
2015
Dixit, S., Sivaperuman, C. & Raghunathan, C. Three new records of polyclad flatworms from India. Marine Biodiversity Records, 8; e29.

Field Notes & Insights

Marine Science Blog

Coral reef monitoring Reef Ecology

What Does a Healthy Reef Look Like? Lessons from the Arabian Gulf

Coral reef health monitoring in the Arabian Gulf presents unique challenges — extreme temperatures, high salinity, and anthropogenic pressures. Here I share what 600+ dives have taught me about reef resilience.

New species polyclad flatworm Taxonomy

How Do You Describe a New Species? A Step-by-Step Inside View

Describing a species new to science is far more rigorous than finding a creature that looks unfamiliar. From morphology to molecular data, here is the full process behind my 15 species descriptions.

Nudibranchs underwater photography Photography

Shooting Nudibranchs: Science Through the Camera Lens

Underwater macro photography is not just art — for taxonomists, a well-captured image can mean the difference between identifying a known species and discovering an entirely new one.

Marine biodiversity Lakshadweep Fieldwork

Life on a Research Cruise: Aboard FORV Sagar Sampada

Five years of long-term reef monitoring from aboard India's premier research vessel. What it takes to run scientific diving operations at sea and what we found beneath the Lakshadweep atolls.

Get in Touch

Let's Connect

For collaborations, specimen identifications, or research inquiries, feel free to reach out. Always open to engaging in discussions on marine taxonomy, reef ecology, and biodiversity conservation.

📍King Fahd University of Petroleum and Minerals, Academic Belt Road, Dhahran 31261, Saudi Arabia
Marine TaxonomyCoral Reef BiodiversityPolycladidaNudibranchsSipunculaReef MonitoringArabian GulfLakshadweepAndaman & NicobarIUCN Red ListScientific DivingMarine ConservationBenthic InvertebratesBiodiversity Assessments

Peer Reviewer For

Zootaxa · Bulletin of Marine Science · Journal of the Marine Biological Association of the United Kingdom