Cerithiidae sp. (unidentified)
A slimmer-shelled cerith snail, not yet identified to species, that laid a semicircular cluster of white eggs on the Seagrass Meadow glass in February 2026 and grazes beside the Dark Cerith on blades and sand.
A second, slightly slimmer-shelled cerith snail species shares the Seagrass Meadow with the Dark Cerith (Cerithium atratum). On February 11, 2026 it was filmed laying eggs on the glass in a semicircular cluster of small white dots, a pattern Josue distinguishes from the Dark Cerith's. Its species is not identified. No introduction event is on record for this species; like the Dark Cerith, it likely arrived via live rock, seagrass material, or deliberate introduction as a cleaning crew species.
The cerith family's general biology is described on the Dark Cerith page and applies here as well: biofilm and algae grazing on seagrass blades and sandy substrate, clustered or coiled egg masses, and wide distribution in Florida seagrass beds. In miniBIOTA this species laid its eggs as a semicircular cluster of separate white dots on the glass. Species-level biology, morphology, and size class are unresolved until identification is performed.
This second cerith species is presumed to be a grazer of biofilm and algae on seagrass blades and sandy substrate, as other members of the family Cerithiidae are. That role is inferred from family-level biology. It was photographed on the Seagrass Meadow glass on August 8, 2026, and a cerith tentatively identified as this species was filmed grazing the glass film on September 16, 2026. Whether it occupies a different niche from the Dark Cerith or competes with it for the same food and surfaces is not yet known.
No introduction event is on record for this species. Like Dark Cerith, it likely arrived as part of a saltwater cleaning crew introduction or via live seagrass or rock material.
Observed as a second cerith species in February 2026 and filmed laying eggs on February 11, 2026; no recruitment from that clutch was confirmed. No dedicated count has ever been recorded for this species. Sightings resumed with this species photographed on August 8, 2026. On July 29, 2026 cerith snails were described as having declined over time alongside the Lightning Nerite, a decline attributable to the same structural cause: free-swimming veliger larvae cannot recruit in a closed system, so losses are not replaced. On September 16, 2026 a single cerith was filmed grazing on the glass; Josue tentatively identifies it as this species and believes it is the last remaining cerith, so the population may be one individual. The identification is tentative and no count was made. Not called extirpated.
Ecological role inferred from Cerithiidae family biology; consistent with the role confirmed for Dark Cerith. No species-specific observations in miniBIOTA.
Marine species inferred from Cerithiidae family biology and Florida seagrass habitat context. No species-specific tolerance measurements have been taken for this individual in miniBIOTA.
Filmed laying eggs on the Seagrass Meadow glass on February 11, 2026, in a semicircular cluster of small white dots that Josue distinguishes from the Dark Cerith's egg pattern. The egg laying was first attributed to the Dark Cerith and was reassigned to this species by Josue in October 2026. No hatching or juvenile recruitment was confirmed.
Ecological role inferred from Cerithiidae family biology; consistent with biofilm and algae grazing as confirmed for Dark Cerith. No species-specific ecological observations in miniBIOTA. No symbiotic relationships documented.
Biofilm and algae grazing
Follow this species across the habitats where it currently appears in the miniBIOTA biosphere.
