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Mystery Blenny

Parablennius incognitus

Mystery Blenny (Parablennius incognitus) is a small, benthic combtooth blenny often found in shallow coastal waters. It lives among rocks, algae, and seagrass, where it perches and darts out to pick small invertebrates and algae.

Saltwater
Mystery Blenny reference image
Etrusko25, public-domain, via Wikimedia Commons. Source: Wikimedia Commons.

Identification points

  • Slender blenny body with a blunt head and large eyes
  • A single continuous dorsal fin with front spines and rear soft rays
  • Fine dark speckling and a mottled brown-gray pattern, often with a pale belly

Habitat

Shallow rocky reefs, tide pools, algal mats, and seagrass beds in coastal marine waters; typically shelters in crevices, among mussel beds, and around jetties or breakwaters.

Bait notes

Not a common sport target. If caught or targeted incidentally, tiny pieces of shrimp, squid, marine worms, or small soft plastics/fly imitations worked close to bottom can draw strikes.

Behavior

A cryptic bottom-dweller that spends much of its time perched on substrate and quickly dashes to feed. It grazes on algae and small benthic invertebrates, is wary around cover, and is most visible in calm shallow water.

Caution

Small coastal blenny; no major consumption hazard is generally noted, but avoid eating fish from polluted harbors or enclosed marinas. Use caution handling around rocks and tide pools to avoid slips and cuts.

Fishing notes

Fish very small baits on light tackle near rocks, weed edges, pilings, and tide pools; keep presentations slow and tight to structure. They are usually best treated as a baitstealing bycatch rather than a dedicated target species.