The oldest animals on Earth. Filter thousands of litres per day — and host an entire reef's worth of life inside.
Sponges are the most ancient animal lineage — over 600 million years old, predating jellyfish and corals. They filter water for plankton through millions of tiny pores, processing up to 10,000 litres per day for a large barrel sponge.
Common Indo-Pacific forms: giant barrel sponges (Xestospongia testudinaria) — some over a metre across and centuries old; tube sponges in pink, blue or yellow; encrusting sponges that paint coral surfaces in vivid colour patches.
They host whole micro-ecosystems — gobies, shrimp, hawkfish all live inside sponges. Andaman, Maldives, Bali, Red Sea — every reef. The barrel sponges of the Caribbean and Red Sea are the photo icons; tube sponges are reliable macro subjects.
Tap a month to highlight it across destinations, or hover any cell for details.
18 destinations across Goa, Andamans, SE Asia, Indian Ocean, Arabian Gulf, East Africa — peak seasons vary by location, so plan your trip around the right destination AND the right month.
Tier 1Sponges here: Jan–May, Oct–Dec · 12 sites
Tier 2Sponges here: Jan–Apr, Dec · 30 sites
Tier 1Sponges here: Apr–Nov · 35 sites
Tier 1Sponges here: Feb–Sep · 25 sites
Tier 1Sponges here: Jan–Apr, Nov–Dec · 40 sites
Tier 2Sponges here: Jan–Apr, Nov–Dec · 15 sites
Tier 2Sponges here: Apr–Nov · 25 sites
Tier 2Sponges here: Jan–May, Dec · 30 sites
Tier 2Sponges here: Jan–Apr, Oct–Dec · 25 sites
Tier 2Sponges here: Jan–Apr, Sep–Dec · 20 sites
Tier 4Coming soonSponges here: Jan–May, Oct–Dec · 15 sites
Tier 3Sponges here: Apr–Nov · 40 sites
Tier 3Coming soonSponges here: Jan–Feb, Jul–Dec · 22 sites
Tier 3Coming soonSponges here: Apr–Oct · 12 sites
Tier 3Coming soonSponges here: Jan–May, Nov–Dec · 20 sites
Tier 3Coming soonSponges here: Mar–Oct · 18 sites
Tier 4Coming soonSponges here: Apr–May, Sep–Nov · 30 sites
Tier 4Coming soonSponges here: Jan–Apr, Oct–Dec · 50 sites
Real, curated expeditions — or a custom trip built around the best season and destination to encounter sponges.
Browse our curated, small-group dive trips — fixed dates, vetted partner operators, zero agency fee. Or tell us your dates and we'll build a custom trip around the best season and destinations to encounter sponges.
Tell us when you can travel and your certification level — we'll match the right destination, the right season, and the right trip for diving with sponges.
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