Tessellated Blenny (Hypsoblennius Invemar) saltwater aquarium fish portrait

The Tessellated Blenny, Hypsoblennius invemar, is a small combtooth blenny with a scaleless, moderately elongated body, a steep and robust head, and branched cirri rising above the eyes and nostrils. Its signature marking is a mosaic of orange to brick-red spots and polygons across the head and forward body, outlined and separated by blue, with a dark blotch sitting just behind the eye. The species ranges through the Western Atlantic from the northern Gulf region across the Caribbean and along South America to Brazil, where it occupies shallow, bottom-oriented reef structure and artificial habitat, frequently taking up residence in empty barnacle shells.

A 30-gallon aquarium is a sound minimum for an adult, and the layout matters more than the volume. Build generous structured live rock with small holes, crevices, swim-throughs, and elevated perches that stand in for the barnacle shells this blenny claims in the wild. A mature, stable system with established biofilm and microalgae gives it grazing surfaces and encourages natural behavior. Because it perches far more than it swims, strong flow and intense lighting are unnecessary. A secure, tight-fitting lid is essential, as jumping losses have been documented in home aquariums.

In nature this omnivore works benthic surfaces for microalgae, small benthic crustaceans, and worms, and studies of oil-platform food webs also recorded a dietary contribution from epiphytic production. Captive specimens should receive a comparable mixture rather than a single food type. Appropriately small pellets and frozen items such as small mysis, enriched or spirulina brine shrimp, Calanus, and copepods pair well with algae-based preparations and the film algae the fish grazes on its own. Algae alone is not adequate nutrition for this species.

Aquacultured individuals are described as adaptable and readily accept prepared foods, which simplifies the transition into a new system. Small, regular portions suit a fish that feeds opportunistically between perching bouts and picks at surfaces throughout the day. Maintaining some natural grazing area on rockwork supplements planned feedings and keeps the blenny occupied.

Small Pellets Frozen Mysis Enriched Brine Shrimp Spirulina Brine Shrimp Calanus Copepods Algae-Based Foods
Expect an active, engaging perch-dweller that moves in short darts and hops between rocks and shelters rather than cruising open water. It is generally calm with unrelated community fishes, but it can turn territorial toward other blennies and similarly shaped, perch-oriented species, particularly near a favored hole or crevice. Clownfish, chromis, cardinalfish, gobies, tangs, rabbitfish, and many reef-safe wrasses make appropriate companions. Highly aggressive predators should be avoided, and a small new arrival may settle in more reliably if introduced through an acclimation box when larger tankmates are already established.

In a reef display, coral risk is low but not absent. Aquarium accounts indicate the fish does not deliberately target corals and has been maintained alongside zoanthids, corallimorphs, soft corals, and stony corals, yet its constant grazing may lead it to rasp unhealthy or algae-covered coral tissue. Tridacna clams are a poor pairing, since grazing along shells or mantles can keep them shut. Given the wild diet of small crustaceans and worms, some caution is warranted with very small motile invertebrates, even though broader invertebrate compatibility has also been reported.

FAQ

Frequently Asked Questions

About the Tessellated Blenny

  • What tank size should I plan for?
    Plan on a 30-gallon aquarium for an adult, which provides more usable habitat and greater parameter stability. Published recommendations span roughly 20 to 30 gallons, but the larger end is the better long-term choice.
  • Is the Tessellated Blenny safe for a reef aquarium?
    Yes, it is considered reef safe and does not deliberately attack corals, though it may rasp algae-covered or unhealthy coral surfaces. Tridacna clams are discouraged, and very small benthic invertebrates warrant some caution.
  • Can it live with other blennies?
    Use caution. It is typically peaceful with unrelated community fish but can become territorial toward other blennies and similarly shaped perch-dwelling species, especially around its chosen shelter.