Other marine life
Mexican Blind Brotula
Typhlias pearsei
A small, pale, eyeless cavefish endemic to the Yucatan aquifer, adapted to permanent darkness — no functional eyes, reduced pigment, and sensory reliance on lateral line and touch. It lives in the dark zone rather than the lit cavern, so cavern divers rarely encounter it; cave divers report it more often, along with white cave shrimp and the blind swamp eel (Ophisternon infernale).
- Max size
- About 8cm
- Habitat
- Dark zones of the Yucatan karst aquifer; endemic to the peninsula's cenotes and caves
Best places to dive with Mexican Blind Brotula
| Month | Likelihood |
|---|---|
| January | rare |
| February | rare |
| March | rare |
| April | rare |
| May | rare |
| June | rare |
| July | rare |
| August | rare |
| September | rare |
| October | rare |
| November | rare |
| December | rare |
Resident year-round but genuinely rare to see on a cavern dive: it lives beyond the daylight zone where recreational divers do not go. No seasonality.
Sources & last checked
Checked July 2026
This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.
- Mexican blind brotula — Wikipedia
- The complete mitochondrial genome of the Mexican blind brotula Typhlias pearsei — Mitochondrial DNA Part B / NCBI PMC
- Unique Species to Look for in Yucatan Cenotes — Yucatan Today
Note on the data: The IUCN listing is old — the Endangered assessment dates from the late 1980s/1996 and has not been meaningfully revised, so treat the category as indicative rather than current.