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Find Marine Fish & Coral conditions by symptom

Pick a symptom you've noticed and review the related conditions.

Marine Fish & Coral

Foul odor

Appearance worsens while appetite is often relatively maintained

Bleaching gradually spreads toward the base

Brown gelatinous mucus on coral surface

Clamped fins and rapid breathing

Cloudy skin surface and excessive mucus secretion

Color becomes pale

Color fading

Coral coverage

Cryptically colored small organisms crawling on the host coral

Discoloration or browning may accompany recession

Expulsion of zooxanthellae

Fine golden-brown to gray pepper-like dusting on the skin

Gill swelling and respiratory distress (rapid mouth movement)

Gradual expansion of affected skin regions

Gradual tissue recession spreading from a specific point

Growing tips (corallite tips) turn white

Growth stagnation

Increased transparency

Infection spreads to surrounding corals

Lethargy and complete loss of appetite

Localized polyp retraction or areas that fail to open

Localized thinning or bleaching of tissue

Loss of appetite and lethargy

Loss of pigmentation and whitening in affected areas

Occurs frequently in LPS corals

Oxygen consumption

Polyp extension suddenly worsens

Polyps do not open

Polyps fail to open or extend fully

Progression can spread to adjacent colonies

Rapid breathing and open-mouth respiration

Rapid deterioration and loss of appetite

Red to purple slime spreading over rocks and sand

Sloughing of skin and scales

Small brown worms on coral surface

Small nudibranchs or egg masses visible on coral surface

Small pits and erosions along the head and lateral line

Symptoms may appear within hours of dosing

Tissue dissolution

Tissue melts within hours

Tissue recession

Tissue thins and the skeleton becomes visible beneath

Tissue visibly contracts away from polyp bases

Vigorous flashing behavior (rubbing body against objects)

Vigorous scratching against rocks or substrate

White salt-grain-like spots on the body and fins

White skeleton becomes partially exposed

White skeleton exposed

→ See all Marine Fish & Coral conditions