Tsano Rock
TSAH-noh ROK (approx.)
The atlas records 10 collection-point forms from Tsano Rock, across 7 genera.
14.0403°S 34.9108°E
Tsano Rock, also known as Devil Rock, is a huge boulder in Lake Malawi's Malawian waters, about 3 km north-north-west of Monkey Bay.
Where it is
Tsano Rock is on the western shore of Lake Malawi, in its southern third (316 mi south of the lake's northern tip).
Nearest collection points: Mvunguti 0.6 mi north-west · Thumbi East Island 1.8 mi south-east · Monkey Bay 2 mi south
Shore, third and distances are measured from the coordinates above against the lake’s mapped outline.
The water
Lake-wide measured chemistry of Lake Malawi — collection points share their lake's water; site-specific figures are shown only where the literature records them.
Nearest measured station: Monkey Bay (south basin) (~2 km) — Visibility (Secchi) 12.5 m
This site
Surface temperature here
Across Apr–Nov, monthly means run 75 °F to 81 °F — coolest in Jul. Measured by satellite 1995–2023: the daily median of clear readings within 10 km of the site (1473 clear days). The rainy-season months are usually too cloudy to measure and are left blank.
Temperature: ESA Climate Change Initiative, Lakes_cci v3.0 (Asfour et al. 2026; doi:10.5285/a56dba09df8a42ec9fba8b8c7a5e1f69). Chemistry on this page remains the lake's own.
The site
Site photographs describe the boulder as about 73 metres across, with the rock outcrop it fell from still visible above it.
Each entry below is the population of that species recorded here — the form aquarists keep and breed as a distinct, provenance-labelled line. Crossing forms from different collection points is considered hybridisation in the hobby.